Feature replaced in four clues in this puzzle

Question:

Answer:

CAPITALLETTER

Length:

Similar Crossword Questions:

Feature of this puzzle, and where the theme clues ought to have ended up
There is an important one spelled out by the last characters of this puzzle's clues, starting from the top
"Apt" geographical element needed to complete the answers to 10 of this puzzle's clues
Explanatory information about this puzzle is revealed by reading these in the clues
What this puzzle's three identical clues can represent
Like the clues in all the words in this puzzle
Some puzzle clues
Weather Channel feature (it's the puzzle theme found in a quintet of answers)
Cassette deck feature, and a hint to this puzzle's theme
Your role in this puzzle [the asterisked clues will help you crack the case]
Picnic serving, and when divided properly, a hint to a hidden feature of six pairs of puzzle answers
Wee hr., and a hint to a feature common to this puzzle's four longest answers
Puzzle clues, sometimes
Puzzle book feature
Third base, in baseball lingo ... or a hint for answering eight other clues in this puzzle
What can be said about the answers to this puzzle's capitalized clues
Enola Gay, e.g. (and a hint to this puzzle's unusual feature)
Topographic feature represented in this puzzle's circles
Legal maneuver ... with a hint to answering seven clues in this puzzle
TV feature, and a clue to six other answers in this puzzle
Subs ... or a feature of the answers to the 17 asterisked clues?
Item missing in this puzzle's theme that's absent as well in the fill and clues
Event where the number 12 is important, and a feature of 12 two-word answers in this puzzle
Feature of this puzzle's three long Down answers
Feature of this puzzle?