OK, so a member gives it one pal (10)

I believe the answer is:

legitimate

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'ok' is the definition.
(I've seen this before)

'a member gives it one pal' is the wordplay.
'a member gives' becomes 'leg' (I can't justify this - if you can you should give a lot more credence to this answer).
'one' becomes 'i' (Roman numeral).
'pal' becomes 'mate' (I've seen this in another clue).
'leg'+'it'+'i'+'mate'='LEGITIMATE'

'so' is the link.

Can you help me to learn more?

(Other definitions for legitimate that I've seen before include "Genuine" , "Permitted" , "authorised" , "Conforming to the law" , "Legal" .)

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

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