Quarrel, say, in school from EastEnders? (5)

I believe the answer is:

arrow

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'quarrel say' is the definition.
(quarrel is a kind of arrow)

I can't explain the remainder of the clue.

(Other definitions for arrow that I've seen before include "one found near Bow?" , "Indicator; missile" , "Missile for bowman" , "Missile fired from bow" , "William Tell's missile" .)

I've seen this clue in The Telegraph.

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