Talks about endless debauchery in carriages (8)
I believe the answer is:
chariots
'carriages' is the definition.
(chariot is a kind of carriage)
'talks about endless debauchery' is the wordplay.
'talks' becomes 'chats' (I've seen this before**).
'about' means one lot of letters goes inside another.
'endless' means to remove the last letter.
'debauchery' becomes 'riot' ('riot' can be a synonym of 'debauchery').
'riot' with its final letter taken away is 'rio'.
'chats' going around 'rio' is 'CHARIOTS'.
'in' is the link.
(Other definitions for chariots that I've seen before include "Film about the 1924 Olympics" , "Ancient horse-drawn vehicles" , "Ancient racing vehicles" , "Things once drawn" , "Two-wheeled horse-drawn vehicles used by old Romans" .)