What does the cryptic crossword clue "Old French artist heading west, not south (4)" mean?

The definition is "Old". The wordplay uses a reversal. DEGA (reversal="DEGA") = AGED; definition: "Old" The answer is AGED.

Old French artist heading west, not south (4)

Times Cryptic #28631 | 20 Across | 2023-06-16 flower