Crossword Genius

Final implement for cobbler (4)

Ross

I believe the answer is:

last

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This clue could be a double definition.

'final' is the first definition.
(synonyms)

'implement for cobbler' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

Can you help me to learn more?

(Other definitions for last that I've seen before include "Shoemaker's model" , "Most unlikely" , "It helps cobbler" , "model of repair" , "Rearmost" .)

I've seen this clue in The Mirror.
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