The most common and most likely answer to this crossword clue is the 6 letter word TYPIFY
I've seen this crossword clue in The Guardian
T
Y
P
I
F
Y
More clues leading to the result TYPIFY
Buddy explains!

The straight part
We know that "Stand for" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stand for = typify.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 TYPIFY mean?
TYPIFY verb- To embody, exemplify; to represent by an image, form, model, or resemblance.
- To portray stereotypically.
- To serve as a typical or reference specimen of.