Leave art out of this special talk (5)
I believe the answer is:
argot
'special talk' is the definition.
'argot' can be an answer for 'talk' (I have seen 'Talk of thieves' mean 'argot' so perhaps 'talk' could also mean 'argot'). I am not certain of the 'special' bit.
'leave art out of' is the wordplay.
'leave' becomes 'go' (to go is to depart or leave).
'out of' indicates putting letters inside (some letters on the outside of others).
'go' put inside 'art' is 'ARGOT'.
'this' is the link.
Can you help me to learn more?
(Other definitions for argot that I've seen before include "Special language of a groat?" , "Specialised language" , "Patois for groat" , "Cant" , "secret language" .)