Cajole and dupes are converted (8)
I believe the answer is:
persuade
'cajole' is the definition.
(I know that cajole is a kind of persuade)
'dupes are converted' is the wordplay.
'converted' is an anagram indicator.
'dupes'+'are'='dupesare'
'dupesare' is an anagram of 'PERSUADE'.
'and' acts as a link.
(Other definitions for persuade that I've seen before include "Coax, prevail upon" , "'Coax, inveigle (8)'" , "Convince by reasoning" , "influence" , "Cause (someone) to believe" .)