Anthem or church cantata (5)
I believe the answer is:
motet
I believe this is a double definition.
'anthem' is the first definition.
(I've seen this in another clue)
'church cantata' is the second definition.
(I've seen this before)
(Other definitions for motet that I've seen before include "Word; fixed period" , "musical piece" , "Short sacred choral work" , "Piece of sacred music" , "Piece for choir" .)