Small fishing boat (4)
I believe the answer is:
dory
'small fishing boat' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dory that I've seen before include "another fish wanted" , "Golden-yellow fish" , "Marine fish; rowing boat" , "Fish and flat-bottomed boat" , "Fish of mackerel family" .)