The most common and most likely answer to this crossword clue is the 9 letter word TRANSCEND
I've seen this crossword clue in The Guardian
T
R
A
N
S
C
E
N
D
More clues leading to the result TRANSCEND
- Excel mode in which a new spreadsheet closes initially?
- Rise above a general tendency to accept answer by Conservative leader
- Leave behind traveller on vacation to rise around noon
- Rise above wild canters with reindeer, essentially
- Surmount cranes positioned in front of town on new day
- Excel scan modified in course
- Do better than new scan in vogue
- Go beyond collapsed cans in drift
- Vogue featuring answer about eclipse
Buddy explains!

The straight part
We know that "eclipse" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case eclipse = transcend.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 TRANSCEND mean?
TRANSCEND verb- To pass beyond the limits of something.
- To surpass, as in intensity or power; to excel.
- To climb; to mount.