Clothing combo, most adventurous (7)
I believe the answer is:
bravest
'most adventurous' is the definition.
('brave' is associated in meaning with 'adventurous')
'clothing combo' is the wordplay.
'clothing' becomes 'bra' (bra is a kind of clothing).
'combo' becomes 'vest' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'bra'+'vest'='BRAVEST'
Can you help me to learn more?
(Other definitions for bravest that I've seen before include "Most valorous" , "Most heroic" , "Most valiant" , "Most handsome" , "Most courageous" .)