Resolute supporter though incapacitated (4,3)

I believe the answer is:

game leg

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'incapacitated' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'resolute supporter' is the wordplay.
'resolute' becomes 'game' (I can't explain this - if you can you should believe this answer much more).
'supporter' becomes 'leg' (I've seen this in another clue).
'game'+'leg'='GAME LEG'

'though' is the link.

Can you help me to learn more?

I've seen this clue in The Globe and Mail.

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