Excitedly augment encore giving cheer (13)
I believe the answer is:
encouragement
'cheer' is the definition.
(I've seen this before)
'excitedly augment encore' is the wordplay.
'excitedly' indicates an anagram.
'augment'+'encore'='augmentencore'
'augmentencore' with letters rearranged gives 'ENCOURAGEMENT'.
'giving' acts as a link.
(Other definitions for encouragement that I've seen before include "Boost" , "Reassurance, cheer" , "Inspiring support" , "Shot in the arm" , "Something that heartens" .)