Crossword Genius

Demographic division mature set? (3-5)

Ross

I believe the answer is:

age-group

'demographic division' is the definition.
(I've seen this in another clue)

'mature set?' is the wordplay.
'mature' becomes 'age' (synonyms).
'set?' becomes 'group' (group is a kind of set).
'age'+'group'='AGE-GROUP'

I've seen this clue in The Sun.
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