Persuade Nigel I've changed (8)
I believe the answer is:
inveigle
'persuade' is the definition.
(inveigling is a kind of persuading)
'nigel i've changed' is the wordplay.
'changed' is an anagram indicator.
'nigel'+'ive'='nigelive'
'nigelive' is an anagram of 'INVEIGLE'.
(Other definitions for inveigle that I've seen before include "Persuade by trickery - given lie (anag)" , "use enticements" , "Seduce" , "Persuade by deception" , "Coax, sweet-talk" .)