Perked up, seeing red cuckoo (9)
I believe the answer is:
energised
'perked up' is the definition.
('energise' can be a synonym of 'perk up')
'seeing red cuckoo' is the wordplay.
'cuckoo' indicates anagramming the letters.
'seeing'+'red'='seeingred'
'seeingred' with letters rearranged gives 'ENERGISED'.
(Other definitions for energised that I've seen before include "Given drive" , "ready for action" , "Gave vitality to" , "Roused" , "Animated" .)