Of the liver (7)
I believe the answer is:
hepatic
'of the liver' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hepatic that I've seen before include "Pertaining to, or affecting, the liver or liverwort" , "of an organ" , "Livery" , "Relating to the liver" , "brownish-red" .)