Oaf arranged Ballina Uni dance with mates (1,4,2,1,5,4)

I believe the answer is:

a bull in a china shop

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'oaf arranged ballina uni dance with mates' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'arranged ballina uni dance with mates' is the wordplay.
'arranged' is an anagram indicator.
'uni' becomes 'u' (U is an abbreviation for university).
'dance' becomes 'hop' (hop is a kind of dance).
'with' is an insertion indicator.
'mates' becomes 'chinas' (I can't justify this - if you can you should give a lot more credence to this answer).
'ballina'+'u'='ballinau'
'ballinau' anagrammed gives 'abullina'.
'abullina'+'hop'='abullinahop'
'abullinahop' going around 'chinas' is 'A BULL IN A CHINA SHOP'.

Can you help me to learn more?

(Other definitions for a bull in a china shop that I've seen before include "One acting indelicately" , "coming together of Hereford and Worcester?" , "blundering disaster" .)

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

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