Choral work not ending in silence is something suggesting later discussion (10)
I believe the answer is:
moratorium
'something suggesting later discussion' is the definition.
(a moratorium is a temporary suspension)
'choral work not ending in silence' is the wordplay.
'choral work' becomes 'oratorio' (type of choral composition).
'not ending' means to remove the last letter.
'in' means one lot of letters goes inside another.
'silence' becomes 'mum' (as in 'mum's the word').
'oratorio' with its final letter removed is 'oratori'.
'oratori' going within 'mum' is 'MORATORIUM'.
'is' is the link.
(Other definitions for moratorium that I've seen before include "Agreed pause in activity" , "Temporary halt in activity" , "agreed postponement" , "Legal delay" , "Prohibition" .)