tie-up
US /ˈtaɪ.ʌp/
UK /ˈtaɪ.ʌp/

1.
a temporary stoppage or delay, especially in traffic or business
:
•
There was a major traffic tie-up on the highway due to an accident.
•
The unexpected tie-up in production delayed the product launch.
2.
a close connection or association, especially in business or politics
:
•
The company announced a new tie-up with a major tech firm.
•
Their political tie-up led to a strong coalition.