Put into operation (8)
I believe the answer is:
activate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">put into operation</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 "Start, mobilise" , "Make operative" , "Put in motion" , "Cause to start, set in motion" , "Prompt" .)