Initially towed right out to fish (5)
I believe the answer is:
trout
'to fish' is the definition.
(trout is a kind of fish)
'initially towed right out' is the wordplay.
'initially' indicates taking the first letters.
The first letters of 'towed right' is 'tr'.
'tr'+'out'='TROUT'
(Other definitions for trout that I've seen before include "Food fish" , "old bag" , "Game fish related to salmon" , "Tasty fish, perhaps of rainbow kind" , "Small salmonlike fish" .)