What does the cryptic crossword clue "Changes seen in cast, I decided to retire (5)" mean?

The definition is "Changes". The wordplay uses hidden reversed. Hidden reversed in "changes seen in caST, I DEcided to retire" The answer is Edits.

Changes seen in cast, I decided to retire (5)

Telegraph Prize Cryptic #3000 | 26 Across | 2019-04-21 flower