The most common and most likely answer to this crossword clue is the 7 letter word AITCHES
I've seen this crossword clue in The Daily Telegraph
A
I
T
C
H
E
S
More clues leading to the result AITCHES
- Letters to burn — dipped in water, on reflection
- Pair from Hampshire that shouldn't be dropped?
- Characters axed by EastEnders
- Has an urge to chase answer, getting letters
- Letters initially are / is longer
- Characters beginning and ending in Harwich
- Cartoon by Rishi 18 Hanukkah, Halloween and Holi have their origins in these
- Could these be dropped in certain socially inferior circles?
- Hannah's extremities feel irritated surrounded by topsy-turvy ocean
Buddy explains!

The straight part
We know that "Characters axed by EastEnders" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case characters axed by eastenders = aitches.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does AITCHES mean?
AITCHES noun- The name of the Latin-script letter H.