Bert Weedons material (5)

I believe the answer is:

tweed

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

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

'bert weedons' is the wordplay.
'TWEED' is hidden within the letters.
But, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for tweed that I've seen before include "Flower on border" , "Fabric; river" , "Boundary river" , "Twilled cloth" , "Rough woollen cloth" .)

I've seen this clue in The Irish Independent.

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