What does the cryptic crossword clue "A step mate formulated to get spread (4,5)" mean?

The definition is "spread". The wordplay uses an anagram. anagram of A + STEP + MATE = MEATPASTE; definition: "spread" The answer is MEATPASTE.

A step mate formulated to get spread (4,5)

Daily Mail Cryptic #17021 | 16 Across | 2023-01-27 flower