I myself hold the ticket; it's a deadlock (7)
I believe the answer is:
impasse
'it's a deadlock' is the definition.
('impasse' can be a synonym of 'deadlock')
'i myself hold the ticket' is the wordplay.
'myself' becomes 'me'.
'hold' indicates putting letters inside.
'the ticket' becomes 'pass' (pass is a kind of ticket).
'me' going around 'pass' is 'mpasse'.
'i'+'mpasse'='IMPASSE'
(Other definitions for impasse that I've seen before include "cul-de-sac" , "Deadlock or stand-off" , "There's no way past it" , "Lack of movement" , "Unpromising situation" .)