Runs out of clothing? (7)
I believe the answer is:
streaks
'runs' is the definition.
(streaking is a kind of running)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for streaks that I've seen before include "Skaters (anag.)" , "Runs naughtily nude in public" , "Stripes for skaters" .)