Superhuman setter perhaps returned favour (7)
I believe the answer is:
godlike
'superhuman' is the definition.
(similar in meaning)
'setter perhaps returned favour' is the wordplay.
'setter perhaps' becomes 'dog' (setter is a type of dog).
'returned' shows that the letters should be reversed in order.
'favour' becomes 'like' (to favour something is to like or prefer it).
'dog' back-to-front is 'god'.
'god'+'like'='GODLIKE'
(Other definitions for godlike that I've seen before include "Divine" , "Olympian" .)