Here are the possible solutions for first ever public performance clue
Answer
Clue
Relevancy
premiere
Clue
First ever public performance
Definition
(French) to present publicly for the first time
fun
Clue
First word across in the first-ever crossword (1913) and the first of a dozen appearances of the word in this puzzle's grid, written word search-style (left, right, down, and diagonally) ... Can you f
Definition
to act playfully
amen
Clue
Follower of "for ever and ever"
Definition
to conclude prayerfully
cav
Clue
LeBron James, for ever and ever (humor me)
cosmos
Clue
"All that is or ever was or ever will be": Sagan
Definition
(Greek) the universe as an orderly system, also KOSMOS
nohow
Clue
Never, ever, ever
Definition
in no way
over
Clue
Never ever ever getting back together with
Definition
above, in excess, also OWER, OWRE
speedeth
Clue
"The Fly-Away Horse ___ ever and ever away" (Eugene Field)