Crossword Genius

One of those small producers of silk suspenders (6)

Ross

I believe the answer is:

spider

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'one' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

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

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(Other definitions for spider that I've seen before include "Web developer" , "Cue rest; arachnid" , "A crawler" , "Creator of web" , "Member of arachnid family" .)

I've seen this clue in the Evening Standard.
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