What does the cryptic crossword clue "Somewhat faded it — a bleach is still open to further changes (8)" mean?

The definition is "still open to further changes". The wordplay uses a hidden word. Hidden in fadED IT A BLEach The answer is EDITABLE.

Somewhat faded it — a bleach is still open to further changes (8)

Guardian Cryptic #28977 | 4 Down | 2023-01-26 flower