… rich man with rich lady's holding peg (10)

I believe the answer is:

musketeers

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'rich man with rich lady's' is the definition.
I can't judge whether this definition defines the answer.

'peg' is the wordplay.
I cannot quite see how this works, but
'peg' could be 'tee' (tee is a kind of peg) and 'tee' is found within the answer.
This explanation may well be incorrect...

'holding' is the link.

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I've seen this clue in The Guardian.

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