Ticket's end (4)
I believe the answer is:
stub
'ticket's end' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stub that I've seen before include "Possible proof of journey" , "Pencil/cigarette remnant" , "Wee bit of pencil, eg," , "Put out" , "Pencil or cigarette end" .)