Hello, Elle!
Yes, I know "bark".
I think that's an American spelling.
I am sure I have seen it in a Michener book.
19, "Holdall", if you are "knocking on" you are getting "old".
Another name for mansion could be "Hall".
1a, "Glass ceiling", I'll let you parse them. Good practice!
10a, is "Bluegrass", again it's a straightforward parse.
17a, is "Decoct", a new word to me.
Dec and Oct are the months.
I thought it was a tricky one today, several new words for me.
The New Yorkers are heading to JFK Airport to catch their aeroplane home, now.
I think BB and me would get on fine!