Happy New Year to all.
Still trying to finish NW corner of this one. Rest done, including most of the thematic stuff.
So any help with 1d would be appreciated and I also have an issue with my answer for 15d which I thought was right but nothing seems to fit in with 17a.
1d is Better raise official signal to cut altitude (6) I have ??F?ER.
I expect the official is the usual football one.