Old garment seen in Quetta, but not in Quito? (7)
I believe the answer is:
doublet
'old garment' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
(Other definitions for doublet that I've seen before include "Pair of similar things" , "Close-fitting jacket (14th to 17th century)" , "Close-fitting padded jacket of Tudor and Stuart England" , "Old garment worn with hose" , "Former male, close-fitting body garment" .)