Crossword Genius

Chapter by person launching garments (7)

Ross

I believe the answer is:

clobber

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'chapter' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for clobber that I've seen before include "what one barely lacks" , "Hit; gear (sl.)" , "Strike" , "Things people wear" , "Clothing, belongings (informal)" .)

I've seen this clue in The Telegraph.
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