Josh is child (3)
I believe the answer is:
kid
This clue is a double definition.
'josh' is the first definition.
(I know that josh can be written as kid)
'is child' is the second definition.
(I've seen this in another clue)
(Other definitions for kid that I've seen before include "In slang, young child or goat" , "Rib" , "Joke" , "To fool; young animal" , "Soft leather" .)