Shore catch (4)
I believe the answer is:
crab
'shore catch' 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 "Seashore crustacean" , "Crustacean with pincers - grumble" , "Shellfish with pincers" , "Seafood (that can be caught by a rower?)" , "Marine crustacean (seen on 1 across?)" .)