Halve simple comedian's phone storage (3,4)
I believe the answer is:
sim card
'phone storage' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'halve simple comedian's' is the wordplay.
'halve simple' becomes 'sim' (I am not sure about this - if you are sure you should believe this answer much more).
'comedian' becomes 'card' (card can mean a humorous person).
'sim'+'card'='SIM CARD'
Can you help me to learn more?
(Another definition for sim card that I've seen is " Storage device".)