Ticket (6)
'ticket' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for voucher that I've seen before include "Document that serves as evidence of some expenditure" , "Ticket" , "Something that can be exchanged for goods or services" , "Coupon; receipt" , "Document that can be exchanged for goods" .)
'ticket' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for label that I've seen before include "Mark" , "Give name to" , "Identity tag" , "Tag or trade name" , "Tag, tab" .)
(Other definitions for billet that I've seen before include "Assign to lodging" , "Soldier's lodging" , "Lodgings for troops in private house" , "Requisitioned accommodation" , "living quarters" .)