In general, I wear adventurous clothing (6)
I believe the answer is:
mainly
'in general' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for mainly that I've seen before include "Chiefly, principally" , "Chiefly, largely" , "For the most part" , "Generally or largely" .)