Concentrated, extreme (7)

I believe the answer is:

intense

This clue is a double definition.

'concentrated' is the first definition.
(similar in meaning)

'extreme' is the second definition.
(similar in meaning)

(Other definitions for intense that I've seen before include "Acute, vivid" , "Extreme - strong" , "amplified?" , "Showing strong feelings or opinions" , "Deeply felt or vehement" .)

I've seen this clue in The Times.

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