Kid American singer with wig on head (3,3)

'kid american' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'singer with wig on head' is the wordplay.
I cannot really understand how this works, but
'singer' could be 'rat' (I've seen this in another clue) and 'rat' is found within the answer.
'wig' could be 'rug' (rug is a slang term for a wig) and 'rug' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?