What does the cryptic crossword clue "Fabulous creature found in deeper oceans (3)" mean?

The definition is "Fabulous creature". The wordplay uses a hidden word. Hidden in "fabulous creature found in deepeR OCeans" The answer is ROC.

Fabulous creature found in deeper oceans (3)

Times Cryptic #28631 | 27 Down | 2023-06-16 flower