Puzzle theme which appears nine more times in the grid

Question:

Answer:

ABE

Length:

Similar Crossword Questions:

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)
Theme of this puzzle, seen seven times in the grid
Theme of this puzzle, whose members are hidden throughout the grid
Number of times the letter 'U' appears in each of this puzzle's eight longest answers
Minimum number of times each letter of the alphabet appears in this puzzle's solution
Bit of footwear that appears at both ends of this puzzle's theme answers
Mark that appears four times in this puzzle (hint: the baseball player who's the answer to this puzzle uses one, too)
It appears several times in this puzzle, so fill'er up!
Letter that appears 28 times in this grid
Second of a pair of letters swapped six times in this puzzle's theme entries
First of a pair of letters swapped six times in this puzzle's theme entries
Word appearing eight times in this puzzle grid
New element whose name will be ratified in January, 2010, and whose symbol appears in the middle of this puzzle's theme answers
Platform ... or something that appears four times in this puzzle?
Puzzle's theme
Write in any of this puzzle's eight theme answers?
Noted arcade classic, and this puzzle's theme
___ accent, mark used symmetrically six times in this puzzle's solution
Puzzle theme, part 3
This puzzle's theme includes them
Informal greetings (that were used to create this puzzle's theme)
"Too bad," and a hint to this puzzle's theme
Act affectedly, and what this puzzle's theme entries do?
This puzzle's theme entries
Classic question answered six times in this puzzle