Supporter of ex-PM (English not American), one who was recently deported (5,6)
I believe the answer is:
boris becker
'was recently deported' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'supporter of ex-pm english not american one' is the wordplay.
'supporter of' says to put letters next to each other (supports the letters above in a down clue).
'ex-pm' becomes 'Boris' (Boris Johnson).
'english not american one' becomes 'becker' (I can't explain this - if you can you should believe this answer much more).
'boris'+'becker' is 'BORIS BECKER'.
'who' acts as a link.
Can you help me to learn more?
(Another definition for boris becker that I've seen is " Wimbledon Men's Singles Champion 1985-6 and 1989".)