Adventure, lark (8)
I believe the answer is:
escapade
I believe this is a double definition.
'adventure' is the first definition.
(I know that adventure can be written as escapade)
'lark' is the second definition.
(both can mean an adventure or amusement)
(Other definitions for escapade that I've seen before include "Mischievous exploit" , "Piece of reckless mischief" , "Risky lark" , "Exciting, perhaps mischievous, adventure" , "Risky venture" .)