Fish traps put out (5)
I believe the answer is:
sprat
'fish' is the definition.
(sprat is a kind of fish)
'traps put out' is the wordplay.
'put out' indicates an anagram.
'traps' anagrammed gives 'SPRAT'.
(Other definitions for sprat that I've seen before include "Small marine fish" , "It may catch a mackerel" , "Herring's smaller relative" , "Small herring, often smoked or canned" , "Small herring-type fish" .)