Lively, cheerful (5)
I believe the answer is:
perky
I believe this clue is a double definition.
'lively' is the first definition.
(I've seen this before)
'cheerful' is the second definition.
(similar in meaning)
(Other definitions for perky that I've seen before include "Lively, jolly" , "Cheerful, jaunty" , "Cheerful, lively" .)