Here are the possible solutions for numerical puzzle with a 9x9 grid clue
Answer
Clue
Relevancy
sudoku
Clue
Numerical puzzle with a 9x9 grid
Paper puzzle usually involving a 9x9 grid (2004)
Puzzle with a 9x9 grid, often
9x9 number puzzle
Numerical puzzle
four
Clue
Number of times this puzzle's theme word appears diagonally in the grid (to complete the puzzle, shade those words plus the Down answers that begin where they meet)
Definition
the cardinal number next above three
valueofpi
Clue
Subject of an annual March 14 celebration and of this puzzle, celebrated in both a literal and a numerical way in the first square of the starred answers, reading left to right
meta
Clue
Puzzle-within-a-puzzle puzzle
Definition
(US) concerned with cultural conventions; (of an artistic work) self-referential
