The preamble states "Wordplay in the other eight across clues contains a superfluous letter that should
be ignored."
So far I have several answers where the wordplay omits a letter, and I don't think they fit in the other group.
I've only just started so can't really help but the first couple of across clues I've looked at seem to have a letter missing from the wordplay rather than a superfluous one!
Thanks, Brendan and Jono ... glad I'm not losing my marbles.
I think I fit in the "don't" camp. 😀 I have the name, based on the missing letters, but Google hasn't been very enlightening. Not asking for hints, I'll put it aside for a while.