Church vocal could be so? (6)
I believe the answer is:
choral
'be so?' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'church vocal' is the wordplay.
'church' becomes 'ch' (abbreviation on maps etc).
'vocal' becomes 'oral' (I've seen this in another clue).
'ch'+'oral'='CHORAL'
'could' is the link.
Can you help me to learn more?
(Other definitions for choral that I've seen before include "To do with group of singers, often in church" , "Involving many singers" , "Of a singing group" , "Beethoven symphony" , "Sung by a band of singers" .)