Crossword puzzle clue "you can't stop humming it"

You can't stop humming it

You were ejected for humming Mozart?

"You're glumping the pond where the Humming-Fish hummed!"

Street corner things that tell you you can't park here, if you should stop, where to go, etc.

Beastie Boys "You can't, you won't and you don't stop" song

Humming with activity

Humming ungulate

Humming sound