Tried to return thanks, seduced (9)
I believe the answer is:
attempted
'tried' is the definition.
('attempt' can be a synonym of 'try')
'return thanks seduced' is the wordplay.
'return' shows that the letters should be reversed in order.
'thanks' becomes 'ta' (UK informal version of 'thank you').
'seduced' becomes 'tempted' (I've seen this before).
'ta' written backwards gives 'at'.
'at'+'tempted'='ATTEMPTED'
'to' acts as a link.
(Other definitions for attempted that I've seen before include "Made an effort to accomplish something" , "Tried" , "Endeavoured" .)