The Latin abbreviations and poem clues are pretty out there, I don't even know what i'd put in for the keyword if i had guessed the poem one correctly.

if you can't even fit the definition into the box, its a stretch to expect many people to get it. This seems like it's trying too hard to be high brow. I much prefer a good, brain teasing puzzle to a test of knowledge. A lot of work obviously went into this and I appreciate that, but a good format idea is worth a thousand words, even if they rhyme!