Maybe leave half-baked, likely loser out of golf (7)
I believe the answer is:
underdo
'maybe leave half-baked' is the definition.
I can't judge whether this defines the answer.
'likely loser out of golf' is the wordplay.
'likely loser' becomes 'underdog' (the competitor least likely to succeed).
'out of' indicates named letters should be taken away.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'underdog' with 'g' taken away is 'UNDERDO'.
Can you help me to learn more?
(Other definitions for underdo that I've seen before include "Cook too briefly" , "Cook in a bad way" , "Rarely cook" , "half-baked" , "Cook for short time" .)