Hang back (3)
I believe the answer is:
lag
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hang back</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lag that I've seen before include "Fall behind on march" , "Drag one's feet" , "Convict (slang)" , "Delay" , "habitual criminal?" .)