Trawlers' gear (4)
I believe the answer is:
nets
'trawlers' gear' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nets that I've seen before include "Catches (fish)" , "'Traps for 29 dn, say (4)'" , "bags" , "Meshes to catch fish, say" , "Traps, to catch fish say" .)