The most common and most likely answer to this crossword clue is the 4 letter word STET
S
T
E
T
More clues leading to the result STET
- Hard to save time, leave it
- It's Let It Be that concludes this great live event
- Alien is on the way — leave it!
- It may stand in the way, note
- As you were about to abandon way through town?
- Don’t change from road with central area blocked off
- Cancel changes in South Vietnamese festival
- Way English teacher originally let it remain
- Tart has bottom pinched. Leave it alone!
- Put back model in collection
Buddy explains!

The straight part
We know that "let it remain" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case let it remain = stet.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 STET mean?
STET noun- A symbol used by proofreaders and typesetters to indicate that a word or phrase that was crossed out should still remain.
- To let (edited material) stand, or remain as it was.