Crossword Genius

Challenge aggressively (6)

Ross

I believe the answer is:

heckle

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

This is the entire clue.

(Other definitions for heckle that I've seen before include "Interrupt (a public speaker) with taunts" , "Harass vocally" , "Jeer abusively" , "disrupt meeting" , "Shout abuse at, a speaker say" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.
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