Weapon bears being thrown about (5)

I believe the answer is:

sabre

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'weapon' is the definition.
(sabre is a kind of weapon)

'bears being thrown about' is the wordplay.
'bears' anagrams to 'SABRE'.
Though, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for sabre that I've seen before include "Bares (anag.)" , "Sword (that may be rattled)" , "Walt --, cartoonist" , "Slasher" , "weapon" .)

I've seen this clue in The Sun.

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