Persuasive lot queen transformed (8)
I believe the answer is:
eloquent
'persuasive' is the definition.
(I've seen this before)
'lot queen transformed' is the wordplay.
'transformed' indicates anagramming the letters.
'lot'+'queen'='lotqueen'
'lotqueen' with letters rearranged gives 'ELOQUENT'.
(Other definitions for eloquent that I've seen before include "Possessing fine flow of words" , "Silver-tongued, articulate" , "Verbally fluent and persuasive" , "Fluent and persuasive of speech" , "Well-spoken - articulate" .)