Avid to agree to change (5)
I believe the answer is:
eager
'avid' is the definition.
(I've seen this before)
'agree to change' is the wordplay.
'to change' indicates anagramming the letters.
'agree' with letters rearranged gives 'EAGER'.
'to' acts as a link.
(Other definitions for eager that I've seen before include "Like some beavers" , "It's a bore" , "Keenly expectant" , "Zealous" , "passionate" .)