Recite with little variation in pitch (6)
I believe the answer is:
intone
'recite with little variation in pitch' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for intone that I've seen before include "Recite as a chant" , "Sing (prayer) on one note" , "Recite in a chanting voice" , "Speak in chanting voice" , "Recite without inflection" .)