Constriction worker? (3)
I believe the answer is:
boa
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">constriction worker?</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 boa that I've seen before include "One who puts the squeeze on" , "Non-venomous snake" , "strangler" , "Large S American snake" , "Python" .)