Rose's joint (3)

I believe the answer is:

hip

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This might be a double definition.

'rose's' is the first definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?

'joint?' is the second definition.
(part of body)

Can you help me to learn more?

(Other definitions for hip that I've seen before include "Joint; rose fruit" , "Slangily trendy part of body" , "Leg joint" , "In slang, trendy or stylish like body joint" , "Trendy bodily joint?" .)

I've seen this clue in the Evening Standard.

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