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According to Spooner, “Stay to dip and expose” (6)

Ross

I believe the answer is:

debunk

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'expose' is the definition.
(synonyms)

I don't understand how the remainder of the clue works.

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(Other definitions for debunk that I've seen before include "Reveal as false, show up" , "Expose pretensions of" , "Show to be exaggerated or false, claim or theory" , "Expose false claim" , "Ridicule" .)

I've seen this clue in The Hindu.
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