Monks' garments (6)
I believe the answer is:
habits
'monks' garments' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for habits that I've seen before include "Usual practices or customs" , "Customs or robes" , "Uniforms of religious orders" , "Customs, wonts" , "Nuns or monks uniforms" .)