Cast an enjoyable time (5)
I believe the answer is:
fling
This clue could be a double definition.
'cast' is the first definition.
(both can mean to throw)
'an enjoyable time' is the second definition.
'fling' can be an answer for 'time' (I have seen 'good time' mean 'fling' so perhaps 'time' could also mean 'fling'). I am not sure about the 'an enjoyable' bit.
Can you help me to learn more?
(Other definitions for fling that I've seen before include "Throw; Scottish dance" , "Throw angrily in spell of indulgent pleasure" , "Spell of indulgence" , "Throw with force" , "Try" .)