The most common and most likely answer to this crossword clue is the 9 letter word HIGHLIGHT
I've seen this crossword clue in The Daily Telegraph
H
I
G
H
L
I
G
H
T
More clues leading to the result HIGHLIGHT
- Most outstanding feature on land is school
- Maybe star's most memorable moment
- Something very good on Kindle to underline
- Point out frivolous noble earlier
- Emphasise the extent of tall tale as told by Spooner?
- Sun, possibly most interesting part
- Outstanding feature — star maybe
- Stress on being drunk and cheerful
- Tallness of Spooner’s story the main feature
Buddy explains!

The straight part
We know that "Outstanding feature" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outstanding feature = highlight.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 HIGHLIGHT mean?
HIGHLIGHT noun- An area or a spot in a drawing, painting, or photograph that is strongly illuminated.
- An especially significant or interesting detail or event or period of time.
- A strand or spot of hair dyed a different color than the rest.
- To make prominent; emphasize.
- To be a highlight of.
- To mark (important passages of text), e.g. with a fluorescent marker pen or in a wordprocessor, as a means of memory retention or for later reference.
- To dye (part of the hair) a different color than the rest.
- To seek the attention of (a user) on IRC by mentioning their name in a message, causing that message to appear highlighted on their screen.