Crossword Genius

Weapon used by erratic flier (5)

Ross

I believe the answer is:

rifle

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

'erratic flier' is the wordplay.
'erratic' indicates an anagram.
'flier' anagrammed gives 'RIFLE'.

'used by' acts as a link.

(Other definitions for rifle that I've seen before include "lock, stock and barrel" , "disarray" , "Long-barrelled gun" , "Search and rob for army weapon" , "Pillage; a weapon" .)

I've seen this clue in the Sydney Morning Herald.
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