The most common and most likely answer to this crossword clue is the 4 plus 4 letter word STAR SIGN
I've seen this crossword clue in The Daily Telegraph
S
T
A
R
S
I
G
N
More clues leading to the result STAR SIGN
- Maybe Leo has prominent role, singing regularly
- Scorpion or crab’s untimely end from stingrays, perhaps?
- Indication of a superior house
- Playing “A” strings, possibly scales
- An indication of a division in high places
- Leo perhaps in second warning about sailor
- Celebrity on mixed gins — Leo, perhaps
- Flamboyant Grant’s is Aquarius
- . Straightens out, but not the house
- Cancer, for example, finally being discovered in new strains
Buddy explains!

The straight part
We know that "Leo, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case leo, perhaps = star sign.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.