Hand over one tenner initially during uninitiated prostitution (9)
I believe the answer is:
extradite
'hand over' is the definition.
(thesaurus)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for extradite that I've seen before include "Hand over to authorities of another country" , "hand over the offender" , "Send away for trial!" , "Bring from abroad" , "Hand over (suspect) to a foreign country" .)