Provide a piece cut from irregular material (3)

I believe the answer is:

arm

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'provide a piece cut' is the definition.
'arm' can be an answer for 'provide' (arming is a kind of providing). I'm unsure of the 'a piece cut' bit.

'from irregular material' is the wordplay.
'from' indicates a hidden word.
'ARM' can be found hidden inside 'irregular material'.

Can you help me to learn more?

(Other definitions for arm that I've seen before include "Maybe rifle" , "Activate warhead" , "5 [BRANCH]" , "Upper limb" , "Authority" .)

I've seen this clue in The Independent.

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