Boycott poet harbouring European buccaneer (10)

I believe the answer is:

blackbeard

'buccaneer' is the definition.
(thesaurus)

'boycott poet harbouring european' is the wordplay.
'boycott' becomes 'black' (I've seen this before).
'poet' becomes 'bard' (bard is a kind of poet).
'harbouring' is an insertion indicator.
'european' becomes 'E' (abbreviation e.g. EU).
'bard' placed around 'e' is 'beard'.
'black'+'beard'='BLACKBEARD'

(Another definition for blackbeard that I've seen is " Pirate".)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.