Fine bet made to a sportsman's advantage (7)
I believe the answer is:
benefit
'a sportsman's advantage' is the definition.
'benefit' can be an answer for 'advantage' (I've seen this in another clue). I am not certain of the 'a sportsman's' bit.
'fine bet made' is the wordplay.
'made' is an anagram indicator.
'fine'+'bet'='finebet'
'finebet' is an anagram of 'BENEFIT'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for benefit that I've seen before include "Fine bet on to produce an advantage" , "Advantage; dole" , "(Gain) advantage" , "Performance for charity" , "allowance" .)