Crossword puzzle clue "never even heard of that"

"___ never even heard of that!"

Letters on a can at a concert for a band you've probably never heard of and probably wouldn't even understand if I told you how good they are

Never, never, never

Even or close to even, in a tennis set

Hit song of 1973 and 1996 with the lyrics "I heard he sang a good song / I heard he had a style"

"I heard you! I heard you!"

U.S. secrety spyey org. that maybe even knows why my mom never calls me back

"You Never Even Call Me by My Name" singer David Allen ___