Dregs live outside university (7)
I believe the answer is:
residue
(Other definitions for residue that I've seen before include "Lees, dregs" , "Part remaining" , "Something remaining" , "What remains of something" , "Remaining portion" .)
I believe the answer is:
residue
(Other definitions for residue that I've seen before include "Lees, dregs" , "Part remaining" , "Something remaining" , "What remains of something" , "Remaining portion" .)