Sourpuss
I believe the answer is:
crab
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sourpuss</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both can mean a grumpy person)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for crab that I've seen before include "Marine crustacean (seen on 1 across?)" , "Seafood (that can be caught by a rower?)" , "move obliquely" , "winch" , "Clawed crustacean" .)