Back in Hanoi, dark latte with a chatty broadcaster (4,5)
I believe the answer is:
talk radio
'chatty broadcaster' is the definition.
'Talk Radio' can be an answer for 'broadcaster'. I'm not certain of the 'chatty' bit.
'back in hanoi dark latte' is the wordplay.
'back' is a reversal indicator.
'in' indicates a hidden word.
'oidarklat' is hidden in the letters of 'hanoi dark latte'.
'oidarklat' in reverse letter order is 'TALK RADIO'.
'with a' is the link.
Can you help me to learn more?
(Other definitions for talk radio that I've seen before include "Broadcast chat" , "Programmes" , "Broadcast discussion" .)