The most common and most likely answer to this crossword clue is the 9 letter word LANDMARKS
I've seen this crossword clue in The Times
L
A
N
D
M
A
R
K
S
More clues leading to the result LANDMARKS
Buddy explains!

The straight part
We know that "distinctive features" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case distinctive features = landmarks.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 LANDMARKS mean?
LANDMARKS noun- An object that marks the boundary of a piece of land (usually a stone, or a tree).
- A recognizable natural or man-made feature used for navigation.
- A notable location with historical, cultural, or geographical significance.
- A major event or discovery.
- To officially designate a site or building as a landmark.