Exult, make merry (7)
I believe the answer is:
rejoice
I believe this is a double definition.
'exult' is the first definition.
(I know that rejoice is a kind of exult)
'make merry' is the second definition.
(I've seen this before)
(Other definitions for rejoice that I've seen before include "Exult, show delight" , "Celebrate" , "Express delight" , "Be happy" , "Exult -- make merry" .)