Spaniard perhaps a pure one corrupted (8)
I believe the answer is:
european
'spaniard perhaps' is the definition.
(spaniard is a kind of European)
'a pure one corrupted' is the wordplay.
'corrupted' indicates an anagram.
'a'+'pure'+'one'='apureone'
'apureone' with letters rearranged gives 'EUROPEAN'.
(Other definitions for european that I've seen before include "Relating to the continent" , "possibly from Italy" , "The continental is a pure one" , "Continental inhabitant" , "'Belgian, Spaniard or Greek, say (8)'" .)