Hugely popular? (8)

I believe the answer is:

enormous

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'popular?' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for enormous that I've seen before include "Extremely large" , "Gross" , "Tremendous, gigantic" , "Extraordinarily large" , "Unusually large - jumbo" .)

I've seen this clue in The Sun.

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