Stage tantrums arising (4)

I believe the answer is:

step

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'stage' is the definition.
(as in a step or stage of a process)

I don't understand the rest of the clue.

(Other definitions for step that I've seen before include "Measure taken" , "'Stage, rung (4)'" , "Indian garment" , "one stage of flight" , "Footfall" .)

I've seen this clue in The Independent.

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