Crossword puzzle clue "if you have this you already knew this answer"

If you have this, you already knew this answer

Response to news you already knew about

Answer, when pointing to this answer, to the question "Which letters answer this clue?"

"You already know the answer is 'team spirit,' right?"

"Shut up already!" ... or what you can do to the start of the answer to each starred clue

Sounds you might make when I say "Would you rather watch your parents have sex or have your parents watch you have sex?"

Knew the answer

Have a ___ engagement (already have plans)