Pretty poetry contains error (4)

I believe the answer is:

typo

'error' is the definition.
(typographical error)

'pretty poetry contains' is the wordplay.
'contains' indicates a hidden word.
'TYPO' is hidden within 'pretty poetry'.

(Other definitions for typo that I've seen before include "Printer's mistake" , "Finger problem" , "Spelling mistake" , "Literal - printing mistake" , "What's not right" .)

I've seen this clue in The Irish Times.

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