Proud having prepared tarragon (8)
I believe the answer is:
arrogant
'proud' is the definition.
('arrogant' can be similar in meaning to 'proud')
'prepared tarragon' is the wordplay.
'prepared' is an anagram indicator.
'tarragon' with letters rearranged gives 'ARROGANT'.
'having' acts as a link.
(Other definitions for arrogant that I've seen before include "Disdainful" , "Conceited, self-important" , "Overbearingly proud" , "Proud and contemptuous" , "Overbearing; conceited" .)