I am stuck on a different clue from everyone else! 17a
Classic music genre rejected by Roosevelt, briefly
_ H _/ O _ _ _
I thought it might be The Odor, but that is not a genre of music
chrise - 15 is a + three-letter word for sticker inside three-letter word for play. 18 is four-letter word for affectionate act around three-letter word for close (noun) + relation finally (one letter) going up.