The most common and most likely answer to this crossword clue is the 4 letter word ELSE
I've seen this crossword clue in The Times
E
L
S
E
More clues leading to the result ELSE
- Different? Spain’s the same on the outside
- More English at school
- Part of hotel seems different
- Otherwise lies in parallel sections
- … in Chelsea or otherwise
- I leave Elsie instead
- Otherwise 5 of G last to drive
- Back in classes learning more
- Otherwise gripped by Handel’s ‘Esther’
- Lose sleep over part that s different
Buddy explains!

The straight part
We know that "More" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more = else.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 ELSE mean?
ELSE adjective- (used only with indefinite or interrogative pronouns) Other; in addition to previously mentioned items.
- (follows interrogative adverbs) Otherwise, if not.
- For otherwise; or else.