Throw one's hat in the ring with rebel teen and Scarlett on the radio (7)
I believe the answer is:
entered
'scarlett on the radio' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs can sometimes mean the same thing.
'throw one's hat in the ring with rebel teen' is the wordplay.
'throw one's hat in the ring' becomes 'red' (I can't justify this - if you can you should believe this answer much more).
'with' is a charade indicator (letters next to each other).
'rebel' is an anagram indicator.
'teen' with letters rearranged gives 'ente'.
'red' put after 'ente' is 'ENTERED'.
'and' is the link.
Can you help me to learn more?
(Other definitions for entered that I've seen before include "moved in" , "Put down" , "Ten deer (anag) - went in" , "Came in; recorded" , "Went in and registered as competitor" .)