Here are the possible solutions for at first once clue
Answer
Clue
Relevancy
thrice
Clue
Once, once more and yet once more
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
anon
Clue
At once, once
Definition
at once; immediately, also ANAN
brahe
Clue
Danish astronomer who was exhumed twice, once to examine the causes of death and once to identify the material of his artificial nose