Content with quantity (3)

I believe the answer is:

ten

'quantity' is the definition.
(ten is a kind of quantity)

'content with' is the wordplay.
'with' says the answer is hidden in the clue.
'TEN' is hidden within 'content'.

(Other definitions for ten that I've seen before include "Roman numeral X" , "How many" , "Dudley Moore/Bo Derek film" , "Very young" , "honour" .)

I've seen this clue in The Mirror.

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