What does the cryptic crossword clue "International organisation faded, we hear — that's natural (6)" mean?

The definition is "natural". The wordplay uses a homophone (sounds like). UN + homophone of “died” (faded) The answer is UNDYED.

International organisation faded, we hear — that's natural (6)

Guardian Cryptic #29007 | 8 Down | 2023-03-02 flower