The most common and most likely answer to this crossword clue is the 10 letter word BETELGEUSE
I've seen this crossword clue in The Times
B
E
T
E
L
G
E
U
S
E
More clues leading to the result BETELGEUSE
- Celestial body — object realigned, unseen — nothing odd in that
- Star’s articulated vehicle, say, pulled up on purpose
- Get blue? See doctor…a real star!
- Star's beet gel use eccentric
- Star, Ringo perhaps, announced: ‘Good, EU’s beginning to evaporate’
- Star, Ringo perhaps, announced: 'Good, EU's beginning to evaporate'
Buddy explains!
The straight part
We know that "Celestial body" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case celestial body = betelgeuse.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.