More perturbed, ring the lover (5)
I believe the answer is:
romeo
'the lover' is the definition.
(I've seen this in another clue)
'more perturbed ring' is the wordplay.
'perturbed' indicates anagramming the letters.
'ring' becomes 'o' (letter resembling a ring).
'more' with letters rearranged gives 'rome'.
'rome'+'o'='ROMEO'
(Other definitions for romeo that I've seen before include "Shakespearean lover" , "Comms code for R" , "Loving youth" , "He was known for loving" , "Code word for the letter R" .)