The most common and most likely answer to this crossword clue is the 4 plus 4 letter word STAR TURN
I've seen this crossword clue in The Daily Telegraph
S
T
A
R
T
U
R
N
More clues leading to the result STAR TURN
- Lead vase is the main attraction
- Prepare to brew up for celeb?
- Jump on vessel as ultimate act
- Top performer beginning fantastic run
- Begin an unusual run as top of the bill
- What inspired potter may do for the big finale?
- Top of the bill set off on vessel
- Top of the bill act? Rats!
- Opener gets run out in captivating draw
Buddy explains!

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.