This young kid eventually starts being a rascal (4)
I believe the answer is:
tyke
'a rascal' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'this young kid eventually starts' is the wordplay.
'starts' suggests taking the first letters.
The first letters of 'this young kid eventually' is 'TYKE'.
'being' acts as a link.
Can you help me to learn more?
(Other definitions for tyke that I've seen before include "Mischievous child" , "Small child or unpleasant person" , "Cheeky kid" , "Naughty kid" , "A worthless dog" .)