Express pleasure for Conservative line (4)
I believe the answer is:
crow
'express pleasure' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe there's an association between them I don't understand?
'conservative line' is the wordplay.
'conservative' becomes 'C' (UK political abbreviation).
'line' becomes 'row' (row is a kind of line).
'c'+'row'='CROW'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for crow that I've seen before include "Black bird; boast" , "One joins others in a murder" , "Make sound of cock - bird" , "Gloat" , "Express triumph; bird" .)