Not sufficiently cooked (9)
I believe the answer is:
underdone
'not sufficiently cooked' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for underdone that I've seen before include "Not fully cooked, more time needed" , "could be rare" , "Inadequately cooked" , "raw!" , "Insufficiently cooked" .)