The most common and most likely answer to this crossword clue is the 9 letter word SPOTLIGHT
I've seen this crossword clue in The Guardian
S
P
O
T
L
I
G
H
T
More clues leading to the result SPOTLIGHT
- Emphasise snub about trophy
- Awkward situation easy to point out
- Draw attention to rebuff outside bank
- Vessel in superficial glare of publicity
- Focus on small vessel coming in
- Snub involving head held up as focus of attention
- Draw attention to minor concealing cannabis
- Draw attention to thin trousers pocket
- Modest accepting trophy and fame
- Draw attention to blemish that’s indistinct
Buddy explains!

The straight part
We know that "one on stage?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one on stage? = spotlight.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 SPOTLIGHT mean?
SPOTLIGHT noun- A bright, directional light or lamp, especially one used to illuminate the focus or center of attention on a stage.
- The circle of light shed by a spotlight.
- The center of attention; the highlight or most important part.
- To illuminate with a spotlight.
- To draw attention to.