Rope-making fibre (5)

I believe the answer is:

sisal

(Other definitions for sisal that I've seen before include "Plant fibre used for ropes" , "Plant yielding rope fibre" , "Rope fibre from leaves of tropical plant" , "Agave cultivated for its fibre" , "Fibre of Mexican agave" .)

I've seen this clue in The Mirror and the Evening Standard.

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