Husband getting wrong fish (7)
I believe the answer is:
herring
'fish' is the definition.
(herring is a type of fish)
'husband getting wrong' is the wordplay.
I cannot really understand how this works, but
'husband' could be 'h' (abbreviation) and 'h' is found within the answer.
'wrong' could be 'erring' (I've seen this before) and 'erring' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for herring that I've seen before include "Fish of northern waters, can be salted or pickled" , "Common food fish" , "Small silvery fish" , "Sea fish" , "one could be soused" .)