Make joyous (5)
I believe the answer is:
elate
'make joyous' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for elate that I've seen before include "Inspirit, make exultant" , "Fill with joy" , "Fill with high spirits" , "Exhilarate, put in high spirits" , "Fill with optimism" .)