European resident in Sudan exposed (4)
I believe the answer is:
dane
'european' is the definition.
(someone from Denmark)
'resident in sudan exposed' is the wordplay.
'resident' indicates a hidden word (I've seen 'resident of' mean this).
'DANE' can be found hidden inside 'in sudan exposed'.
(Other definitions for dane that I've seen before include "Eg, Copenhagen native" , "See 7 Down" , "Hamlet, say" , "Hamlet was one" , "Eg, Hamlet" .)