What does the cryptic crossword clue "Reptile beginning to generate reverberation, from the sound of it (5)" mean?

The definition is "Reptile". The wordplay uses a homophone (sounds like). G~ ECKO (sounds like echo) The answer is GECKO.

Reptile beginning to generate reverberation, from the sound of it (5)

Times Cryptic #29173 | 11 Across | 2025-03-10 flower