Person one day goes to prison (7)
I believe the answer is:
african
'person' is the definition.
(African is an example)
'one day goes to prison' is the wordplay.
'one' becomes 'a'.
'day' becomes 'fri'.
'goes to' is a charade indicator (letters next to each other).
'prison' becomes 'can' (the can is American slang for prison).
'a'+'fri'+'can'='AFRICAN'
(Other definitions for african that I've seen before include "Person from south of the Mediterranean" , "Black" , "Kenyan, perhaps" , "Person from Kenya, say" , "Shona" .)