Passed out in black suits (6)
I believe the answer is:
Here is my best explanation:
'black suits' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps you can see a link between them that I don't see?
'passed out' is the subsidiary indication.
'out' indicates an anagram (out can mean wrong or inaccurate).
'passed' anagrammed gives 'spades'.
'in' is the link.
(Other definitions for spades that I've seen before include "Suit in pack of cards", "those getting soiled?", "Black suit", "Shovels or playing cards", "Passed around with diggers", "Shovels and card suit", "Does some groundwork", "Suit, tools", "trumps sometimes" and "Card suit and sturdy shovels".)