Speak in devout terms (5)
I believe the answer is:
utter
'speak' is the definition.
('utter' can be a synonym of 'speak')
'in devout terms' is the wordplay.
'in' indicates a hidden word.
'UTTER' is hidden in the letters of 'devout terms'.
(Other definitions for utter that I've seen before include "To say, articulate" , "Absolutely" , "Say - complete" , "Express in words" , "Sheer" .)