Intones (6)
I believe the answer is:
chants
'intones' is the definition.
('chant' can be a synonym of 'intone')
This is the entire clue.
(Other definitions for chants that I've seen before include "Monotonous songs, often religious" , "Snatch (anag)" , "Sings or speaks in monotonous way" , "Sings a monotonous song or intones prayers" , "Sings monotonously like monks at prayer" .)