Shh... Listen. Do you smell that?
Ah, Ghostbusters. Hope says you can find a quote from Auntie Mame for any situation. The same could perhaps be said of Ghostbusters.
Anyway, it's not a common thing that the revealer of a puzzle conforms to the theme as well. So I enjoyed that HUSHHUSH had the "shh" present as well, although the clue was a little too self-satisfied for my taste. All five theme answers are solid. I will say I knew what the theme was going to be before I got to the revealer, more or less.
The rest of the puzzle is reasonably solid as well. There are only two 8-letter answers, and a whole bunch of 7- and 6-letter answers, so nothing razzle-dazzle, really. I like NORTHSEA and RUTHLESS, both of which have to make use of one of the doubled Hs in the theme answers.
1A: Psychedelic drug (LSD) gets a C-. Just below average. I never like starting a puzzle on a 3-letter answer.
How sad to have ALTAR and PRENUPS in the same puzzle. Very cynical. If you're going to have SOFA and SAT in a puzzle, it's nice to clue them in parallel fashion (with a Davenport). IGNEOUS is very good. Does anyone have some Chateau LAFITTE we could sip on?