Crossword Genius

Game bar attendant gets internal police approval (4,5)

Ross

I believe the answer is:

draw poker

I'm a little stuck... Click here to teach me more about this clue!

'game' is the definition.
(draw poker is a kind of game)

'bar attendant gets internal police approval' is the wordplay.
I cannot quite see how this works, but
'approval' could be 'ok' (OK is an example) and 'ok' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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