Sell out second match with English going two down (6)

I believe the answer is:

squeal

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'sell out' is the definition.
(thesaurus)

I can't explain the remainder of the clue.

(Other definitions for squeal that I've seen before include "Cry -- snitch" , "Make sound like as stuck pig" , "peach?" , "Inform (as a pig would?)" , "Squeak; inform" .)

I've seen this clue in The Times.

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