Crossword Genius

Mend one end of the shelf, I figure (3)

Ross

I believe the answer is:

fix

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'mend' is the definition.
(synonyms)

'one end of the shelf i figure' is the wordplay.
'one end of the' says to take the final letters.
'i figure' becomes 'ix' (I am not sure about this - if you are sure you should believe this answer much more).
The final letter of 'shelf' is 'f'.
'f'+'ix'='FIX'

Can you help me to learn more?

(Other definitions for fix that I've seen before include "Arrange" , "Sort out" , "mess" , "Fasten" , "Mend" .)

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