Eastern European (4)
'eastern european' is the definition.
(the Slavs are a European people)
This is all the clue.
(Other definitions for slav that I've seen before include "One coming from Eastern Europe or Asian Russia" , "Native of eastern Europe or northwestern Asia" , "European perhaps" , "eg a Pole" , "Eastern European" .)
'eastern european' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for serb that I've seen before include "Someone from Belgrade?" , "A European national" , "One from Belgrade" , "Eastern European" , "Balkan native" .)
(Other definitions for russian that I've seen before include "Native of Moscow, say" , "Countryman" , "nationality" , "Slavonic tongue" , "Slav" .)
(Other definitions for ukrainian that I've seen before include "foreigner" , "Little Russian" , "National" , "From Kiev, say?" , "East European" .)