Well I am glad others have made it through. This really was a tour de force by Hamish, involving as it did coordination as well as construction of the puzzle itself!
One thing slightly puzzles me, tho it is not a problem as I have the actual puzzle solved to my satisfaction and I never submit. The print version instructions say "Enter the contents in alphabetical order (one of one word and two of two words)". I think if things are arranged in alphabetical order they are not words. Enlightenment, please?
Thanks Muraria and Sircrispin (74, 76).
But I'm still not seeing it.
Do I need to come up with a 6th-word clue for the 5th word, perhaps?
I think that the heat must have addled my brain!
I'll keep mulling it over.