Assist in crime (4)
I believe the answer is:
abet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">assist in crime</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for abet that I've seen before include "Help in wrongdoing" , "Help to do something wrong" , "Criminally endorse" , "Encourage or assist (someone) to commit crime" , "helpful" .)