4 words for EX 1–2 letters

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1 letter (2)

e x
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Alphabet (Z–A)
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2 letters (2)

ex xe
Kind of apple
?
E
?
A
?
T
?
E
?
R
Hint 1 meaning
One who, or that which, eats.
Hint 2 anagram
AETRE
Hint 3 another clue
greedy person
11 +1