Crossword Genius

An amphibian, say, with foot digits (4)

Ross

I believe the answer is:

toed

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

'an amphibian say with foot digits' is the definition.
I can't tell whether this defines the answer.

'an amphibian say' is the wordplay.
'an amphibian' becomes 'toad' (toad is a kind of amphibian).
'say' shows a homophone (sound like).
'toad' is a homophone of 'TOED'.

Can you help me to learn more?

(Other definitions for toed that I've seen before include "inferior terminal projections" , "Kicked" .)

I've seen this clue in the Sydney Morning Herald.
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