Crossword Genius

Low quality red tucked into by mistake (8)

Ross

I believe the answer is:

rubbishy

'low quality' is the definition.
(rubbishy means of bad quality)

'red tucked into by mistake' is the wordplay.
'red' becomes 'ruby' (synonyms).
'tucked into by' indicates putting letters inside.
'mistake' becomes 'bish' (I've seen this before).
'ruby' going around 'bish' is 'RUBBISHY'.

(Another definition for rubbishy that I've seen is " Poor-quality".)

I've seen this clue in The Times.
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