Anglican leader given pound for vestment (3)
I believe the answer is:
alb
'for vestment' is the definition.
(alb is a kind of vestment)
'anglican leader given pound' is the wordplay.
'leader' indicates taking the first letters.
'given' means one lot of letters go next to another.
'pound' becomes 'lb' (abbreviation for the unit of weight).
The initial letter of 'anglican' is 'a'.
'a'+'lb'='ALB'
(Other definitions for alb that I've seen before include "Long white robe worn by Christian priest" , "White clerical garment" , "Without hindrance" , "White garment worn by priests" , "Devotional vestment" .)