I have the grid fill and both maxim and item, but there are some annoying loose ends. I am missing a hangover, and, along with other posters, cannot really understand the difference between these and ordinary clues. In particular, I cannot parse 20a. I know what letter I require for the maxim, and this can arise in one of two ways. Either 17a is a hangover, in which case the letter comes from 20a, or 17a is not a hangover, and then 20a is.
I also appear to be missing a letter for the item. This might come from 6d in which case I cannot parse the clue, or 6d is a hangover and the letter comes from elsewhere. This is very frustrating.