Staff provided to help disabled people (6)

I believe the answer is:

crutch

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'staff' is the definition.
(I know that crutch is a type of staff)

I cannot understand how the rest of the clue works.

(Other definitions for crutch that I've seen before include "Support for those with difficulty in walking" , "Lame walker's aid" , "fork" , "Walking support, fits under arm" , "Staff used as an aid to walking" .)

I've seen this clue in The Sun.

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