I myself hold the ticket, so 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' is an insertion indicator.
'the ticket' becomes 'pass' (pass is a kind of ticket).
'me' going around 'pass' is 'mpasse'.
'i'+'mpasse'='IMPASSE'
'so' acts as a link.
(Other definitions for impasse that I've seen before include "hopeless difficulty" , "block" , "hopeless situation?" , "failure to progress" , "No progress is possible in this type of situation" .)