I don't think I've ever seen that clue used for the fill at 1-A before, but it's totally valid and I wonder why other puzzlers don't employ it. Anyhow, that made this a fun challenge - thank you!
I kinda like letting people figure out that it’s a rebus on their own, but I still threw the solver a bone with “anagram of BEDROOM” to be sure they got it
It was hard to keep it in the middle! Here’s my list of 7-letter words with RED in the middle:
Boredom
Firedog
Foredid
Reredos
Heredes
I just went with the first two, they made the most sense to me