Church examination for singers ... (6)
I believe the answer is:
choral
'for singers' is the definition.
(choral means for a choir)
'church examination' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'examination' becomes 'oral' (oral is a kind of examination).
'ch'+'oral'='CHORAL'
(Other definitions for choral that I've seen before include "Sung by many voices" , "To do with group of singers, often in church" , "... his ninth ..." , "Sung by group of singers" , "19's 9th 16" .)