Brave cooks wrapping date exotically, perhaps (6)
I believe the answer is:
adverb
'exotically perhaps' is the definition.
('exotically' is an adverb)
'brave cooks wrapping date' is the wordplay.
'cooks' indicates an anagram.
'wrapping' is an insertion indicator.
'date' becomes 'd' (common abbreviation eg in DOB, date of birth).
'brave' anagrammed gives 'averb'.
'averb' placed around 'd' is 'ADVERB'.
(Other definitions for adverb that I've seen before include "Braved (anag)" , "Word such as 'madly'" , "One's really" , "Word that qualifies an action" , "Modifying word (gram.)" .)