I have the wordplay for Reel 15 as 4 (leave) +5 (strong liquor). Reel 28 is the usual party doing the splitting with the final word as the definition.
Jamesm, I had the opposite experience. The quotation fell into place just in time for the Reels to open up, allowing me to skip a couple of the gnarlier short clues. The checked letters were a nuisance until then, though, and it all took time.
Still staring at the end game! I can't tell if it's related to the quote or source beyond the first block. There seem to be two or three ways to read the (incomplete) hints.