O, Romeo, perchance turmoil at last has been vanquished (4)

I believe the answer is:

over

I'm a little stuck... Click here to teach me more about this clue!

'perchance turmoil at last has been vanquished' is the definition.
I can't judge whether this definition defines the answer.

'o romeo' is the wordplay.
'romeo' becomes 'ver' (I can't explain this - if you can you should believe this answer much more).
'o'+'ver'='OVER'

Can you help me to learn more?

(Other definitions for over that I've seen before include "Excessive" , "Beyond; finished" , "Finished; six balls" , "A bowler's round in cricket" , "Rouond of six bowls in cricket" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.