Crossword Genius

Need guts to sacrifice second Queen (6)

Ross

I believe the answer is:

entail

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'need' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for entail that I've seen before include "Inevitably result in" , "Invlove or necessitate" , "Restriction on inheritance" , "outmoded fashion" , "Occasion" .)

I've seen this clue in The Hindu.
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