Talk of getting change for a groat! (5)
I believe the answer is:
argot
'talk of getting' 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'm not sure about the 'of getting' bit.
'change for a groat' is the wordplay.
'change for' indicates an anagram.
'groat' anagrammed gives 'ARGOT'.
Can you help me to learn more?
(Other definitions for argot that I've seen before include "Cant" , "Criminal jargon" , "Father or mother" , "Jargon - patois" , "Jargon or slang (of a group)" .)