Keen to agree to change (5)
I believe the answer is:
eager
'keen' is the definition.
(I've seen this before)
'agree to change' is the wordplay.
'to change' indicates anagramming the letters.
'agree' anagrammed gives 'EAGER'.
'to' is the link.
(Other definitions for eager that I've seen before include "Anxious" , "Showing keen interest" , "really keen" , "Like some beavers" , "Sharp" .)