Fearless, fashionable, cool -- about right! (8)

I believe the answer is:

intrepid

'fearless' is the definition.
('intrepid' can be a synonym of 'fearless')

'fashionable cool about right' is the wordplay.
'fashionable' becomes 'in' ('in' can be similar in meaning to 'fashionable').
'cool about right' becomes 'trepid' (I've seen this in other clues).
'in'+'trepid'='INTREPID'

(Other definitions for intrepid that I've seen before include "Unfearing" , "Audacious" , "Fearless, adventurous" , "I printed this way, being daring" , "Undaunted" .)

I've seen this clue in The Telegraph.

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