What does the cryptic crossword clue "Reptile somewhat resembling a tortoise (5)" mean?

The definition is "Reptile". The wordplay uses a hidden word. Hidden in "reptile somewhat resemblinG A TORtoise" The answer is GATOR.

Reptile somewhat resembling a tortoise (5)

Independent Cryptic #1785 | 20 Down | 2024-05-12 flower