Catholic prayer (3,5)
I believe the answer is:
ave maria
'catholic prayer' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ave maria that I've seen before include "Hail Mary (Lat.)" , "Catholic prayer" , "Work of Schubert" , "Hail Mary, in Latin" , "Hail Mary in prayer (3.5)" .)