Clerical garb (3)
I believe the answer is:
alb
'clerical garb' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alb that I've seen before include "clerical belongings" , "White garment worn by priests" , "Priests robe made in Balbriggan" , "ecclesiastical garment" , "Devotional vestment" .)