ROUX

Fat and flour mixture, cooked and used to make sauces (4)

Solution has appeared in 2 crosswords (2 across and 0 down):

• Quick crossword No 15,996 — 2021-08-12 23:00:14
  8A: Mixture of butter and flour used in cooking (4)
• Quick crossword No 15,671 — 2020-07-28 23:00:15
  20A: Fat and flour mixture, cooked and used to make sauces (4)