Diligent (9)

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assiduous

'diligent' is the definition.
(similar in meaning)

This is the entire clue.

(Other definitions for assiduous that I've seen before include "Showing great care and perseverance" , "Persevering" , "Hard-working" , "Marked by care and persistent effort" , "Diligent" .)

I've seen this clue in the Newsday.com, The Telegraph, The Guardian and The Times.

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