Hello, friends, and welcome to this week's Monday Muggle Meta. Thanks to MMM-meister Peter Abide; to Alan Kennan for adding some especially witty clues (one of his trademarks); and to Joe Ross for his formatting help. Nudges will be posted on Wednesday, though I suspect this puzzle will be firmly in the wheelhouse of many Muggles.
Nudges:
Step 1: Say the asterisked entries out loud. How do they relate to "Greek" in the title?
Step 2 is a little trickier. How do the English and Greek alphabets differ?
Which alphabet has more letters?
The English alphabet has 26 letters: A is 1, B is 2, C is 3, etc. Same letter/number principle applies to the Greek alphabet.
Now, how can you use those numbers vis-a-vis the six Greek letters that you sounded out in the grid?