Ah, thanks Chrise, turns out I had filled in wrong answers for 4a and 6d which both fitted the crossers!
I agree that many clues seem a bit "loose". I'd like to think that's why I missed the fact that my 4a and 6d answers didn't really parse :)
... but I managed to persevere to the end. (hopefully no other mistakes!)
There was an "eye-rhyming" pair, though not a proper rhyming one.
Seemingly a lot of paired letters ("SS", "MM", etc.)
The repetition of one word in two solutions didn't make a great impression, otherwise a good Everyman.