Crossword Genius

A possible clue for when crude (9)

Ross

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9

5-4

rough-hewn

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'a possible clue for when crude' is the definition.
I can't judge whether this definition defines the answer.

'when crude' is the wordplay.
I cannot quite see how this works, but
an anagram of 'when' is 'hewn' which is present in the answer.
'crude' could be 'rough' (similar in meaning) and 'rough' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

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(Another definition for rough-hewn that I've seen is " Crudely shaped".)

I've seen this clue in The Times.
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