Fellow apt to cheat at golf? (3)

I believe the answer is:

dog

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'fellow' is the definition.
(dog is a kind of fellow)

'cheat at golf?' is the wordplay.
'cheat' becomes 'do'.
'at' means one lot of letters go next to another.
'golf?' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'do'+'g'='DOG'

'apt to' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for dog that I've seen before include "Cur" , "Shadow" , "Follow - canine" , "Follow; pet" , "Domestic animal" .)

I've seen this clue in the Evening Standard.

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