A half paid sort of golf championship? (3-2)

'a half paid sort of golf championship?' is the definition.
I can't tell whether this defines the answer.

'a half paid' is the wordplay.
I cannot quite see how this works, but
'a' is present in the answer.
'paid' could be 'pro' (I've seen this in other clues) and 'pro' is found within the answer.
A single letter 'm' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?