Crossword Genius

Put off by man not closing washing up liquid? (5)

Ross

I believe the answer is:

deter

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'put off' is the definition.
(both can mean to discourage)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for deter that I've seen before include "stop" , "Hinder, prevent" , "Frighten off; prevent" , "Put (someone) off" , "Discourage (an activity)" .)

I've seen this clue in The Independent.
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