He’s promised you a ticket (7)
I believe the answer is:
voucher
'ticket' is the definition.
(I've seen this before)
'he's promised you a' is the wordplay.
I cannot quite understand how this works, but
'you' could be 'u' (I've seen this in other clues) and 'u' is found within the answer.
'he' could be 'che' and 'che' is located in the answer.
The remaining letters 'vor' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for voucher that I've seen before include "Document that can be exchanged for goods" , "Something that can be exchanged for goods or services" , "Coupon; receipt" , "Coupon that can be redeemed" , "Paper token" .)