Sides up to…goodness (!)…our own Hollywood star (9)

I believe the answer is:

hemsworth

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'our own hollywood star' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'sides up to goodness' is the wordplay.
'sides up' becomes 'hems' (I can't justify this - if you can you should give a lot more credence to this answer).
'to goodness' becomes 'worth' (I've seen this in another clue).
'hems'+'worth'='HEMSWORTH'

Can you help me to learn more?

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

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