Naomi clueless? Just mixed up perhaps (13)

I believe the answer is:

miscellaneous

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'mixed up perhaps' is the definition.
I can't tell whether this defines the answer.

'naomi clueless?' is the wordplay.
'naomi clueless' anagrams to 'MISCELLANEOUS'.
But, I'm unsure how the anagram is indicated.

'just' is the link.

Can you help me to learn more?

(Other definitions for miscellaneous that I've seen before include "Multifarious" , "Consisting of several kinds" , "Sundry" , "Not just one kind" , "Of various types" .)

I've seen this clue in The Globe and Mail.

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