Handy artisan grabs cereal to rub in? (5,4)

I believe the answer is:

gloat over

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'rub in?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'handy artisan grabs cereal' is the wordplay.
'handy artisan' becomes 'glover' (I can't justify this - if you can you should give a lot more credence to this answer).
'grabs' is an insertion indicator.
'cereal' becomes 'oat' (oat is a kind of cereal).
'glover' enclosing 'oat' is 'GLOAT OVER'.

'to' acts as a link.

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

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