Crossword Genius

Tramp circling rocky ridge finds amphibian (4,4)

Ross

I believe the answer is:

tree frog

I'm a little stuck... Click here to teach me more about this clue!

This could be a double definition.

'tramp circling rocky ridge' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'amphibian' is the second definition.
(tree frog is a kind of amphibian)

'finds' acts as a link.

Can you help me to learn more?

(Other definitions for tree frog that I've seen before include "Amphibian found in the branches?" , "Arboreal amphibian" , "High jumper" .)

I've seen this clue in The Times.
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