Way of working: very ornate, disregarding one old leather (7)
I believe the answer is:
morocco
'leather' is the definition.
(morocco is a kind of leather)
I don't understand the remainder of the clue.
(Other definitions for morocco that I've seen before include "Country of fine leather" , "Soft leather used for in book binding" , "in which literature may be bound to sell" , "Fine soft leather from goatskin" , "Arab state" .)