Leave skill out of the conversation! (5)
I believe the answer is:
argot
'the conversation' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'leave skill out' is the wordplay.
'leave' becomes 'go' (to go is to depart or leave).
'skill' becomes 'art' (both can mean a talent).
'out' means one lot of letters goes inside another.
'go' placed within 'art' is 'ARGOT'.
'of' is the link.
Can you help me to learn more?
(Other definitions for argot that I've seen before include "Groat (anag)" , "Slang for a groat (5)" , "Patois, vernacular" , "Talk of thieves" , "Special language of a groat?" .)