No lynchpins holding back the material (5)

I believe the answer is:

nylon

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'the material' is the definition.
(nylon is a kind of material)

'no lynchpins holding back' is the wordplay.
'lynchpins holding' becomes 'lyn' (I can't justify this - if you can you should give a lot more credence to this answer).
'back' is a reversal indicator.
'no'+'lyn'='nolyn'
'nolyn' backwards is 'NYLON'.

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(Other definitions for nylon that I've seen before include "A thermoplastic" , "Stocking; polymer" , "Cover for leg" , "Fabric (originally from New York and London)" , "Plastic used for stockings" .)

I've seen this clue in the Sydney Morning Herald.

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