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Not many say a person should (3,2,3)

Ross

I believe the answer is:

one or two

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

'not many' is the definition.
(I've seen this in another clue)

'a person should' is the wordplay.
I cannot really understand how this works, but
'a' could be 'one' and 'one' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

'say' acts as a link.

Can you help me to learn more?

(Another definition for one or two that I've seen is " A couple".)

I've seen this clue in The Independent.
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