Chat, getting into train at terminus (6)
I believe the answer is:
natter
'chat' is the definition.
('natter' can be a synonym of 'chat')
'into train at terminus' is the wordplay.
'into' indicates the answer is hidden within the clue.
'NATTER' can be found hidden inside 'train at terminus'.
'getting' is the link.
(Other definitions for natter that I've seen before include "Talk inconsequentially" , "Casual talk" , "Talk socially without exchanging too much information" , "idle talk" , "Gossip, maybe annoyingly" .)