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' says the answer is hidden in the clue (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" .)