Peruvian skincare after peeling twice (4)
I believe the answer is:
inca
'peruvian' is the definition.
(the Inca were a historical people of Peru)
'skincare after peeling twice' is the wordplay.
'after peeling twice' says to take the centre (the word is stripped of outside letters twice).
The middle letters of 'skincare' are 'INCA'.
(Other definitions for inca that I've seen before include "Member of Andean people conquered by Spain" , "Ruler of an old empire centred on Cuzco" , "Inhabitant of old Peru" , "S. Am native, lord in Quechua" , "South American (historical)" .)