Sports clothes: get 'em off (5)

I believe the answer is:

strip

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'sports clothes' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for strip that I've seen before include "Gradually undress to music" , "Series of cartoons" , "Undress completely" , "sports outfit" , "Remove clothing" .)

I've seen this clue in The Sun.

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