The most common and most likely answer to this crossword clue is the 3 letter word DUE
D
U
E
More clues leading to the result DUE
- Scheduled affair of honour? Not quite
- Expected of the French facing English
- Expected of the French and English
- Reportedly, morning moisture expected
- Outstanding, timeless couple's song
- Member of nobility ignoring king, as expected
- Proper contest of honour avoided by learner
- Proper contest shortened
- By the sound of it, drops of water on grass expected
- Appropriate work for a couple lacking time
Buddy explains!

The straight part
We know that "Outstanding" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outstanding = due.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 DUE mean?
DUE noun- Deserved acknowledgment.
- (in plural dues) A membership fee.
- That which is owed; debt; that which belongs or may be claimed as a right; whatever custom, law, or morality requires to be done, duty.
- Right; just title or claim.
- Owed or owing.
- Appropriate.
- Scheduled; expected.
- Having reached the expected, scheduled, or natural time.
- Owing; ascribable, as to a cause.
- On a direct bearing, especially for the four points of the compass
- (used with compass directions) Directly; exactly.