Crouch down (5)
I believe the answer is:
squat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">crouch down</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 squat that I've seen before include "Hunker down" , "Sit on heels" , "Dumpy - crouch" , "Illegal occupation of premises" , "Short exercise" .)