Lobster cousin (4)
I believe the answer is:
crab
'lobster cousin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for crab that I've seen before include "Fiddler, perhaps" , "Stalk-eyed crustacean" , "Sour character" , "Scuttling crustacean" , "terrible row" .)