Guts not found in chicken? (5)

I believe the answer is:

nerve

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'guts' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

(Other definitions for nerve that I've seen before include "Courage - or effrontery" , "Steadiness, courage" , "Sensory organ; bottle" , "Intrepidity" , "Bodily fibre that transmits sensations" .)

I've seen this clue in The Sun.

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