After a quick coffee I feel energised again.
COD:- 21d - Mainly because of its surface, succinctness and the fact it didn't take me an age to solve.
I'll be very interested to hear what you all thought. Did you stick with, give up or did you find it a stroll in the park and don't know what I'm going on about.
Let us know in the comments.
Thanks to Enigmatist for a very challenging work-out.
Stay safe:-)