Hooded cloak displayed by Catholic dignitary in love (6)
I believe the answer is:
domino
'hooded cloak' is the definition.
(I've seen this before)
'displayed by catholic dignitary in love' is the wordplay.
'displayed by' says to put letters next to each other.
'catholic dignitary' becomes 'dom' (title for some Catholic monks, from Latin dominus).
'love' becomes 'o' (love means zero in tennis).
'dom' put next to 'in' is 'domin'.
'domin'+'o'='DOMINO'
(Other definitions for domino that I've seen before include "Playing piece; cloak" , "Piece with pips; Fats ---, R&B singer" , "such a falling effect" , "Black and white game tile" , "one coming down with many others?" .)