Who for one closer outside court? (6)
I believe the answer is:
doctor
'who' is the definition.
(from 'Doctor Who', the famous TV series)
'one closer outside court?' is the wordplay.
'one closer' becomes 'door' (I can't explain this - if you can you should give a lot more credence to this answer).
'outside' means one lot of letters goes inside another.
'court?' becomes 'ct' (abbreviation used in road names).
'door' going around 'ct' is 'DOCTOR'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for doctor that I've seen before include "Physician" , "An apple a day keeps him away" , "Medical practitioner, for instance" , "Onshore breeze" , "Adulterate; medic" .)