Pirate flag (5,5)

I believe the answer is:

jolly roger

'pirate flag' is the definition.
(synonyms)

This is the entire clue.

(Other definitions for jolly roger that I've seen before include "standard not welcomed in the main" , "standard for boarders?" , "Pirates' flag" , "In the main a fearful sight" , "Pirate flag" .)

I've seen this clue in The Guardian, The Mirror and the Sydney Morning Herald.

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