Set in motion (4)
'set in motion' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stir that I've seen before include "created by an agitator?" , "Begin to move" , "riot" , "prompt" , "Rouse; prison (colloq.)" .)
'set in motion' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for move that I've seen before include "Budge" , "Depart" , "Change (house)" , "Proceed" , "Manoeuvre; go" .)
'set in motion' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for start up that I've seen before include "Begin" , "New firm" , "Found" , "Newly-established business" , "Newly created business" .)
'set in motion' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for trigger that I've seen before include "prompt" , "Lever to activate firing mechanism" , "Roy Rogers' horse" , "Activating device" , "Pull it to discharge gun" .)
'set in motion' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for actuate that I've seen before include "Put into effect" , "trip?" , "Put into action" , "get going" , "Put into operation" .)
'set in motion' is the definition.
(synonyms)
This is all the clue.
(Other definitions for launch that I've seen before include "'Send into water or into space, say (6)'" , "Set (a boat) afloat" , "starter?" , "Set up - found" , "Boat; put in the water" .)
(Other definitions for stir up that I've seen before include "Excite - incite" , "Incite; mix" , "Fire in" , "Cause or provoke trouble" , "Foment (trouble)" .)
(Other definitions for lead off that I've seen before include "Begin, start" , "Initiate an action" , "Make a start" , "Begin the dance" .)