Awfully eager to concur (5)
I believe the answer is:
agree
'concur' is the definition.
(synonyms)
'awfully eager' is the wordplay.
'awfully' indicates anagramming the letters.
'eager' is an anagram of 'AGREE'.
'to' acts as a link.
(Other definitions for agree that I've seen before include "Accord, match" , "confess?" , "suit" , "Accept" , "Give consent" .)