Bold underwear from Buddhist school (6)
I believe the answer is:
brazen
'bold' is the definition.
(I've seen this before)
'underwear from buddhist school' is the wordplay.
'underwear' becomes 'bra' (bra is a type of undergarment).
'from' says to put letters next to each other.
'buddhist school' becomes 'zen' (I've seen this in another clue).
'bra'+'zen'='BRAZEN'
(Other definitions for brazen that I've seen before include "Boldly impudent" , "Impudent, shameless" , "Forward" , "Brassy and impudent." , "Bold-faced" .)