Spirited, lively (6)
I believe the answer is:
feisty
This clue is a double definition.
'spirited' is the first definition.
(similar in meaning)
'lively' is the second definition.
(Other definitions for feisty that I've seen before include "Plucky and spirited" , "Spiritedly aggressive" , "Spirited, exuberant" , "Agressive or excitable in American usage" , "Lively and quarrelsome" .)