Crossword puzzle clue "toon often seen in a hunting hat"

Toon often seen in a hunting hat

"The Simpsons" toon-within-a-toon mouse

Something often seen on a street corner, briefly ... or, literally, something seen in each corner of this puzzle

He wore a top hat in "Top Hat"

Dancer with a Cat in the Hat hat and pacifier, maybe

Hat dance hat

Substance under Little Cat Z's hat in "The Cat in the Hat Comes Back"

It's rarely seen under a hat