Crossword Genius

University mobs disturbed bosses (5)

Ross

I believe the answer is:

umbos

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'bosses' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how they can define each other.

'university mobs disturbed' is the wordplay.
'university' becomes 'U' (abbreviation for university).
'disturbed' is an anagram indicator (the order of letters is disturbed).
'mobs' anagrammed gives 'mbos'.
'u'+'mbos'='UMBOS'

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I've seen this clue in the Sydney Morning Herald.
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