Children's animation featuring popular kids (7)
I believe the answer is:
bambini
'kids' is the definition.
(bambino is a kind of kid)
'children's animation featuring popular' is the wordplay.
I cannot quite understand how this works, but
'popular' could be 'in' ('in' can mean trendy) and 'in' is found in the answer.
The remaining letters 'bambi' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bambini that I've seen before include "Italian kids" , "kids from Rome" , "issue" , "Italian infants" .)