Thanks to Imogen for, for me anyway,was a real challenge.
In fact, despite being sure of my answers, there are still 7 I've yet to fully parse, and I wasn't helped by some of the definitions being a bit obscure.
For example, in 17a where does the last letter come from - "air"? If so, why? In 6d, where does the "colour" fit in? 26a - where is "a number"?
I could go on, but I'll have a cup of coffee and look at them again later.
FOI was 1d.
COD: A tie between 3d and 7d.
How did you get on? Did you find it as tricky as me or was it a walk in the park?
Stay safe:-)