Crossword Genius

Visitor to market, one on foot (3,3)

Ross

I believe the answer is:

big toe

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'visitor' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?

'market one on foot' is the wordplay.
'market one on' becomes 'big' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'foot' becomes 'toe' (toeing is a kind of footing).
'big'+'toe'='BIG TOE'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for big toe that I've seen before include "that once went to market?" , "Corn grows here" , "member of the body" , "Largest pedal extremity" , "Largest foot digit" .)

I've seen this clue in The Guardian.
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