Odd spirit raised for quiet talk (6)
I believe the answer is:
murmur
'quiet talk' is the definition.
'odd spirit raised' is the wordplay.
'odd' becomes 'rum' (I've seen this before).
'spirit' becomes 'rum' (I've seen this before).
'raised' says the letters should be written backwards.
'rum'+'rum'='rumrum'
'rumrum' in reverse letter order is 'MURMUR'.
'for' is the link.
(Other definitions for murmur that I've seen before include "Quietly spoken utterance; heart defect" , "Low continuous sound" , "Indistinct mutter" , "Little noise" , "Soft voices (of discontent)" .)