Redesign of latrines revealing internal material (8)
I believe the answer is:
entrails
'redesign of latrines revealing internal material' is the definition.
I can't judge whether this definition defines the answer.
'redesign of latrines' is the wordplay.
'redesign of' indicates an anagram (I've seen 'redesigns' mean this).
'latrines' anagrammed gives 'ENTRAILS'.
Can you help me to learn more?
(Other definitions for entrails that I've seen before include "Intestines of animals" , "Internal parts of animals" , "Internal organs of animals" , "Innards, viscera" , "Intestines, guts" .)