Agent isn’t honest in answers (7)
I believe the answer is:
replies
'answers' is the definition.
(to reply is to give an answer)
'agent isn't honest' is the wordplay.
'agent' becomes 'rep' (short for representative).
'isn't honest' becomes 'lies' (tells lies).
'rep'+'lies'='REPLIES'
'in' acts as a link.
(Other definitions for replies that I've seen before include "Responds" , "Answers" , "Reacts verbally" .)