Storage facility for kid's play (4)
I believe the answer is:
disk
'storage facility' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'kid's play' is the wordplay.
'play' is an anagram indicator.
'kids' with letters rearranged gives 'DISK'.
'for' is the link.
Can you help me to learn more?
(Other definitions for disk that I've seen before include "Thin, flat, circular plate" , "Floppy - - (comput.)" .)