Wear quite unsuitable for loose living (6)
I believe the answer is:
tights
'wear' is the definition.
(tights is a kind of wear)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tights that I've seen before include "Hose coverings from waist to feet" , "Leg garment" , "Ladies or theatrical hose" , "Leg-wear for women" , "layer of clothing" .)