Philosopher works? (4)
I believe the answer is:
mill
I believe this is a double definition.
'philosopher' is the first definition.
(thesaurus)
'works?' is the second definition.
(mill is a kind of works)
(Other definitions for mill that I've seen before include "Building in which grain is ground to flour" , "Grind (grain)" , "Plant with facilities for manufacturing" , "Flour factory" , "Vacuous" .)