Well, I got that in the weirdest way.
Writer and Rider made me think of Birds comment how British people think Americans pronounce those the same and I wonder if Rick was making an in-joke. Now I couldn't see anything anything at all and when you can't see anything the tiniest little rabbit holes keep reappearing and bugging you. Okay, so CLAWSAT46DAttacks, cat-style[-------] could sound like CLOSET and the Writer/Rider could be a hint at that. Now obviously that's not it. No one would make such a puzzle but... there's nothing nothing else. Okay, to get it off my chest I wrote to Cap'n Rick and said "That's not it, right?".
Now I've noticed a thing about muggles. It's impossible to write to any muggle, myself, included, and say "Can you answer this question? Yes/No? No nudges. Just answer the question" and not have them give you a nudge. So I was told the center clue was key. Well, okay, I figured that's not really much of a spoiler. After all it was directly about halloween so I figured it'd probably figure. I just couldn't figure how and thought if I'd get a toehold I might figure it out.
But I had nothing so I figure I'd try looking at what EERIE40ALike an encounter with a ghost[-----] could relate, but it couldn't relate in any way. EER-Like but there were no clues with EER. There weren't even more than two clues with EE. Could it be ER? By weird coincidence there were exactly six entries with ER. So I go through the entries one by one seeing if they could be alternate answers or parallel synonyms of words with ER. Not much luck. I personally have never said buckAroo but always buckEroo so could it be Ero??? That's weak. Is IAN56AAuthor Fleming[---] (fleming) a writer? The we had BUSTER26AActor Keaton[------]. Did Dan Ayckroyd ever have a role as a BUSTER26AActor Keaton[------]? Go to IMDB....
.... and that's that.