What every other letter of every answer in this puzzle is

Question:

Answer:

VOWEL

Length:

Similar Crossword Questions:

Letter that appears at least once in every single answer in this puzzle
Mark that appears four times in this puzzle (hint: the baseball player who's the answer to this puzzle uses one, too)
Number of F's in this puzzle's answer grid
Like each starred answer's first letter, when used as a numeral
Struck out, as one letter in each of this puzzle's theme answers
Item hidden in each of the 15-letter answers in this puzzle
Response to "What's a six-letter answer for 'Silent performer'?"?
Drink cooler ... or a hint to six squares in this puzzle's answer
Home-field advantage in football ... or what the last square of the answer to this clue represents in this puzzle
HBO hit, or a hint to the starts of this puzzle's 11-letter answers
What the circled letter in this answer represents, homophonically
What each of the 10 abbreviations in this puzzle's answer stands for
1967 Box Tops hit about part of a puzzle answer grid?
Enclosure ... and an alphabetical listing of letters not appearing elsewhere in this puzzle's answer
Kind of secret represented by each two-letter puzzle clue?
Letter upon which this puzzle's theme is built
Last letter in most plurals (but not in this puzzle's six longest answers, which are the only plurals in this grid)
What you might answer when asked "What's a three-letter synonym for 'tin'?" by a gentleman?
Mumps symptoms (and technically, this should be "Great Britain," but how often does one get a chance to put this answer in a puzzle?)
Like this puzzle answer
It starts with this answer's first letter
Number of letters in the shortest answer in this puzzle
Letter switched to ess in this puzzle's theme
Start of an open letter from the puzzle constructor: "Dear ___, you seem a bit confused about what the V. P. does every day, so here are some helpful hints ..."
Treat represented visually by this puzzle's answer