I'm stuck on a couple and think perhaps I have a letter wrong somewhere?
6d Runs after deliveries, every one's cause of strain? (9)
I have O?T?R?A??
19a Aide's back to cover delay by ambassador? That's a load of rubbish (8)
I have S?A???A?
The final letter of 6d is also the 5th letter of 19a.
I have possible answers for both but neither fit with the common letter!