The guts to declare CSI:Vegas stuffed up (7)

I believe the answer is:

viscera

I'm a little stuck... Click here to teach me more about this clue!

'the guts' is the definition.
(viscera are one's internal organs)

'declare csivegas stuffed up' is the wordplay.
'VISCERA' is hidden back-to-front in amongst the letters.
But, I am uncertain how the hidden word is indicated.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for viscera that I've seen before include "Guts" , "Entrails -- CIS rave (anag)" , "organs inside" , "Internal organs, intestines" , "Abdominal organs -- cars vie (anag)" .)

I've seen this clue in the Sydney Morning Herald.

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