Group about to appear in Great Bake Off (3,7)

I believe the answer is:

age bracket

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'group' is the definition.
The answer is an example.

I don't understand how the remainder of the clue works.

(Other definitions for age bracket that I've seen before include "similarly old people" , "Perhaps 18-30 group" , "Those people born in a range of years" .)

I've seen this clue in The Independent.

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