Clue: Basic epicurean concoction heaped atop moussaka's exquisite layers, primarily? (8)
Answer: BÉCHAMEL
Explanation: Basic epicurean concoction heaped atop moussaka's exquisite layers, primarily? (8)
The 'primarily' clue for this week: the first letters of the first eight words of the clue, with an &lit definition.