Crossword Genius

Prince not quite competing with King after support for filibuster, once (9)

Ross

I believe the answer is:

privateer

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(Other definitions for privateer that I've seen before include "Pare rivet down for a ship authorised to make war" , "Non-naval vessel of old, licensed to attack" , "Non-government owned warship" , "Armed ship used in war but not government-owned" , "Sailor may go on it" .)

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