Fight press to waste metal (5,4)

I believe the answer is:

scrap iron

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'waste metal' is the definition.
'scrap iron' can be an answer for 'metal' (scrap iron is a kind of metal). I am not certain of the 'waste' bit.

'fight press' is the wordplay.
'fight' becomes 'scrap' (a scrap is a minor fight).
'press' becomes 'iron' (ironing is a kind of pressing).
'scrap'+'iron'='SCRAP-IRON'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for scrap iron that I've seen before include "rubbish" , "Waste metal for melting down" , "for recycling" , "Discarded metal" .)

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

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