Teasing talk in suburban territory (6)
I believe the answer is:
banter
'teasing talk' is the definition.
(banter is teasing or mocking talk)
'in suburban territory' is the wordplay.
'in' says the answer is hidden in the clue.
'BANTER' can be found hidden inside 'suburban territory'.
(Other definitions for banter that I've seen before include "Good-natured chaff" , "Humorous ridicule" , "Tease in good-humoured way" , "Joke in a good-humoured way" , "Light-hearted friendly talk" .)