Crossword Genius

Support retreating holding a weapon (5)

Ross

I believe the answer is:

taser

'weapon' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for taser that I've seen before include "Stunning weapon" , "A shocking thing" , "Device used to stun someone temporarily" , "police weapon introduced" , "PC kit" .)

I've seen this clue in The Independent.
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