Gibe to upset the market-goer? (3,3)

I believe the answer is:

big toe

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'market-goer?' is the definition.
I can't tell whether this definition defines the answer.

'gibe to upset' is the wordplay.
'upset' indicates anagramming the letters.
'gibe'+'to'='gibeto'
'gibeto' with letters rearranged gives 'BIG TOE'.

'the' acts as a link.

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

I've seen this clue in The Times.

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