ooh, fun! is there going to be seven of them (hence 7×7×7)?
the NW of this puzzle was much easier for me, as it had a lot less names-- 7A was inferrable from a few crosses, but had to look up the full title of the album when i didn't know the proper nouns in the SE. overall, fun puzzle! particularly liked the clue for REF :)
Thanks for your feedback! The plan is to put one out seven days a week, instead of the increasing-size minis/midis I was doing five days a week, until I get bored lol