Tricky Dick swaps vote for new material (5)

I believe the answer is:

ninon

I'm a little stuck... Click here to teach me more about this clue!

'material' is the definition.
(I know that ninon is a type of material)

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

Can you help me to learn more?

(Other definitions for ninon that I've seen before include "Fine, strong, silky fabric" , "delicate material" , "Dressmaker" , "Fine sheer fabric" , "Lightweight silk fabric" .)

I've seen this clue in The Independent.

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