Resinous substance secreted by certain insects used in the manufacture of shellac (3)
I believe the answer is:
lac
(Other definitions for lac that I've seen before include "Dark red resin - "Hotel du ___" (Anita Brookner)" , "Insect-produced resin" , "Resinous insect secretion" , "Ingredient of varnish" , "Resin used to make varnish" .)