Enjoyment or zest (5)
I believe the answer is:
gusto
I believe this is a double definition.
'enjoyment' is the first definition.
(I know that gusto is a type of enjoyment)
'zest' is the second definition.
(synonyms)
(Other definitions for gusto that I've seen before include "Relish; vigour" , "Exuberant enjoyment" , "Zest, pleasure in action" , "Great enthusiasm" , "Hearty enjoyment" .)