Set in motion (8)

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set in motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for activate that I've seen before include "Prompt" , "Give life to" , "Launch" , "Start working" , "Start, mobilise" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set in motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stir that I've seen before include "Stimulate; prison" , "Uproar" , "Mix round" , "created by an agitator?" , "Move; wake" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set in motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for move that I've seen before include "Depart" , "Change address" , "change position on board" , "Shift" , "Change residence; propose formally" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set in motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for start up that I've seen before include "Newly-established business" , "Newly created business" , "newly formed company" , "fresh concern" , "Newly-formed company" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set in motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for trigger that I've seen before include "Pull it to discharge gun" , "Roy Rogers' horse" , "arm with this?" , "Activating device" , "Start" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set in motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for actuate that I've seen before include "Switch on" , "Put into effect" , "Trigger off, energise" , "get going" , "Put into action" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set in motion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(launching is a kind of setting in motion)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for launch that I've seen before include "publicity event" , "Large motorboat" , "Inaugurate" , "Set up - found" , "Boat - set in motion" .)
(Other definitions for stir up that I've seen before include "Cause or provoke trouble" , "Fire in" , "Instigate" , "Get excited" , "Foment (trouble)" .)
(Other definitions for lead off that I've seen before include "Begin the dance" , "Initiate an action" , "Begin, start" , "Make a start" .)