Crossword puzzle clue "it might say what part of 'cookie' don't you understand"

It might say "What part of 'cookie' don't you understand?"

"What part of 'fat chance' don't you understand?"

"All right, brain, I don't like you and you don't like me - so let's just do this and I'll get back to killing you with ___": Homer Simpson

Dessert that, if you can't both "have" and "eat," I don't really understand the meaning of "have"

Uses, as a chair - or the floor if you don't understand what a chair is

"You Just Don't Understand Me" author Deborah

You might rate them on their route and they might rate you on you vomited everywhere

"I'm gonna say it like a man and make you understand, ___!"