A trendy joint (3)

I believe the answer is:

hip

I believe this is a double definition.

'a trendy' is the first definition.
(thesaurus)

'joint' is the second definition.
(hip is a kind of joint)

(Other definitions for hip that I've seen before include "Fruit of the wild rose (3)" , "Side of body - very sophisticated" , "In slang, trendy or stylish like body joint" , "Body part; cool" , "Pelvic joint" .)

I've seen this clue in the Evening Standard.

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