It carries gossip about source of wine (9)
I believe the answer is:
grapevine
'it carries gossip about source of wine' is the definition.
The definition suggests a singular noun which matches the answer.
'it carries gossip about source of wine' is the wordplay.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'carries gossip' becomes 'vin' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'about' is an insertion indicator.
'source of wine' becomes 'grape' (I've seen this in another clue).
'e'+'vin'='evin'
'evin' going within 'grape' is 'GRAPEVINE'.
Can you help me to learn more?
(Other definitions for grapevine that I've seen before include "Informal source of information" , "whose constituents go to press" , "Fruit-bearing plant - rumour mill" , "origin of wine?" , "Bush telegraph" .)