Crossword Genius

Such a highly-rated company unhappy with small imperfection (4-4)

Ross

I believe the answer is:

blue-chip

I'm a little stuck... Click here to teach me more about this clue!

'such a highly-rated company' is the definition.
I can't tell whether this defines the answer.

'unhappy with small imperfection' is the wordplay.
'unhappy' becomes 'blue' (blue can mean sad or miserable).
'with small imperfection' becomes 'chip' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'blue'+'chip'='BLUE-CHIP'

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I've seen this clue in The Times.
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