Throw around (5)
I believe the answer is:
'throw around' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sling that I've seen before include "Catapult or support as for injured arm" , "harness for broken arm" , "American drink" , "Bandage support; hurl" , "throwing implement like catapult" .)