Also used in joinery? (3)

I believe the answer is:

and

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'also' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for and that I've seen before include "See 20" , "Joining word" , "it needs wholly positive input for positive result" , "Also" , "It connects words, clauses or sentences" .)

I've seen this clue in the Evening Standard.

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