Little boy (6)
I believe the answer is:
nipper
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">little boy</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 nipper that I've seen before include "Claw (large) - child (small)" , "It may pinch" , "Small boy (old slang)" , "Kid - claw" , "Small child or crab's claw" .)