Thanks for the answer - do you think its correct as for 38a. J. Lennon's Imagine - Ive got Nothing to live or die for. so this makes Skye incorrect.
Of course I could have the lyrics incorrect.
The answers are as follows:
1d - Reversing political endorsement: Backing
44a - Island where keys go astray: Skye
61a - Do revue horribly late: Overdue
I'm glad I could help.