Fashionable group picture (5)

I believe the answer is:

inset

'picture' is the definition.
(inset is a kind of picture)

'fashionable group' is the wordplay.
'fashionable' becomes 'in' ('in' can be similar in meaning to 'fashionable').
'group' becomes 'set' (set is a kind of group**).
'in'+'set'='INSET'

(Other definitions for inset that I've seen before include "Synagogue singer" , "Picture inside a larger one" , "Small picture inserted within a larger one" , "day for teachers" , "Small picture placed within a larger one" .)

I've seen this clue in The Telegraph.

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