Nun’s uniform (5)

I believe the answer is:
habit
(Other definitions for habit that I've seen before include "can cause addiction" , "Custom - costume" , "Addiction to a drug" , "Custom; clothing" , "Custom; riding dress" .)
I believe the answer is:
habit
(Other definitions for habit that I've seen before include "can cause addiction" , "Custom - costume" , "Addiction to a drug" , "Custom; clothing" , "Custom; riding dress" .)