Number of F's in this puzzle's answer grid

Question:

Answer:

ONE

Length:

Similar Crossword Questions:

Using both sides with equal frequency (like the letters in this puzzle's answer grid?)
Number of X's in this puzzle's answer
Number of letters in the shortest answer in this puzzle
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)
1967 Box Tops hit about part of a puzzle answer grid?
Number of Qs in this puzzle's grid
Number of consonants in this answer
Number to the left of this answer
Like each answer in this puzzle - also each word in each clue - in length
Number of Qs in this grid
Rectangular array that's identical when its rows and columns are transposed, as this puzzle's grid
Like aleph in the central black squares of this puzzle's grid
Number-logic puzzle
Thing that may appear to be symmetrical but isn't ... like this puzzle's grid
Briefly, one is aptly placed in the grid in the answer to each starred clue
Today, to CaesarÂ—and a hint to the hidden word appearing in this puzzle 15 times (including the one in this answer)
Descriptive of this puzzle's grid
Event where the number 12 is important, and a feature of 12 two-word answers in this puzzle
Spin, as a cue ball, and how to answer each starred clue in this puzzle?
The 2x2 black square near the middle of this puzzle's grid, e.g., which is part of eight answers
Like this answer, or a two-word description of this puzzle's theme
Number of protons by which the elements in the four longest puzzle answers have been enhanced
What you can find in the grid after completing this puzzle, looking up, down, left, right and diagonally, word search-style
Number of F's in this grid
Theme of this puzzle, whose members are hidden throughout the grid