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 am not certain of the 'of getting' bit.
'change for a groat' is the wordplay.
'change for' is an anagram indicator.
'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)" .)