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' is an anagram indicator.
'agree' is an anagram of 'EAGER'.
'to' acts as a link.
(Other definitions for eager that I've seen before include "Anxious" , "Showing keen interest" , "really keen" , "Like some beavers" , "Sharp" .)