Concentrated Stock for Chefs, a Half-Glaze

Puzzle 13 of Deserts Medium Pack

Question is: Concentrated Stock for Chefs, a Half-Glaze

and the answer is: DEMIGLACE

Word Meaning:

DEMIGLACE — A rich brown sauce in French cuisine, typically made from veal stock and espagnole sauce, used by itself or as a base for other sauces.

Definitions from Wiktionary.