I'm late to this and although I've got many of the answers ready to insert, I would appreciate a nudge on one of the critical edges to help me insert them (extra letter in the wordplay): Peanuts maybe go, in the end, in empty boxes (12, 2 words).
Hope I didn't make it too obvious. Always difficult to get the balance right. I found the puzzle not overly difficult - but the theme very obscure. No idea what the cryptic clue from the extra letters meant.