A raconteur might be a snitch (4,5)
I believe the answer is:
tell tales
'a raconteur might' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'a snitch' is the wordplay.
I cannot really see how this works, but
'snitch' could be 'tell' (I've seen this in another clue) and 'tell' is found in the answer.
The remaining letters 'tales' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'be' is the link.
Can you help me to learn more?
(Another definition for tell tales that I've seen is " put in sneaky report".)