Throw a support for an injured member (5)

I believe the answer is:

sling

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'throw' is the definition.
(chuck means throw as does sling)

I cannot understand how the remainder of the clue works.

(Other definitions for sling that I've seen before include "Arm support; hurl" , "Catapult - shoe - support" , "Chuck; support for damaged arm" , "Support bandage; drink" , "Arm bandage; hurl" .)

I've seen this clue in The Irish News.

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