Look round quiet church giving sermon (6)
I believe the answer is:
speech
'sermon' is the definition.
(thesaurus)
'look round quiet church' is the wordplay.
'look' becomes 'see'.
'round' means one lot of letters goes inside another.
'quiet' becomes 'p' (music symbol for 'piano').
'church' becomes 'ch' (common abbreviation).
'see' placed around 'p' is 'spee'.
'spee'+'ch'='SPEECH'
'giving' acts as a link.
(Other definitions for speech that I've seen before include "Talking - language - oration" , "Harangue" , "Vocal communication" , "words" , "'Utterance, talk (6)'" .)