Bad test result? Let it stand! (4)

I believe the answer is:

stet

I'm a little stuck... Click here to teach me more about this clue!

'let it stand' is the definition.
(I've seen this before)

'bad test result?' is the wordplay.
'test' anagrams to 'STET'.
But, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for stet that I've seen before include "leave things as they were" , "This must not be changed" , "Let it stand (editing mark)" , "Let it stand (L)" , "marginal instruction" .)

I've seen this clue in The Irish Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.