One runs out of clothes (8)
I believe the answer is:
streaker
'one runs out of clothes' is the definition.
I can't judge whether this definition defines the answer.
'one runs out of clothes' is the wordplay.
'one runs' becomes 'streaks' ('streak' can be a synonym of 'run').
'out' means to remove the last letter.
'of clothes' becomes 'er' (I can't explain this - if you can you should believe this answer much more).
'streaks' with its last letter taken away is 'streak'.
'streak'+'er'='STREAKER'
Can you help me to learn more?
(Other definitions for streaker that I've seen before include "One can run fast" , "One running out of clothes?" , "One barely running in public" , "One who runs naughtily nude in public" , "Person who runs naked through a public place" .)