A foolish person going round Brazil? (7)
I believe the answer is:
nutcase
This clue might be a double definition.
'a foolish person' is the first definition.
(I've seen this before)
'going round brazil?' is the second definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
(Other definitions for nutcase that I've seen before include "bird may need to crack this" , "Loony" , "Eccentric" , "Slangily, a crazy person" , "Slang for a crazy person" .)