Crossword puzzle clue "when one might wear a hat"

When one might wear a hat

___ day (when you might want to wear a hat): 2 wds.

'Do that one would rarely wear a hat with

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"

"___ Paradise" ("Weird Al" Yankovic song with the lyric "I never wear buttons but I got a cool hat, and my homies agree I really look good in black")