South American tattoo artist called out? (4)
I believe the answer is:
inca
'south american' is the definition.
(the Inca were a South American civilization)
'tattoo artist called out?' is the wordplay.
'tattoo artist' becomes 'inker' (inker can informally mean a tattoo artist).
'called out?' shows a homophone (sound like).
'inker' sounds like 'INCA'.
(Other definitions for inca that I've seen before include "Member of Andean people conquered by Spain" , "Pre-conquest South American Indian" , "lived in Peru" , "mountain dweller" , "One of an old race of South America" .)