Fight the press using waste metal (5-4)
I believe the answer is:
scrap-iron
'waste metal' is the definition.
'scrap iron' can be an answer for 'metal' (scrap iron is a kind of metal). I am unsure of the 'waste' bit.
'fight the press' is the wordplay.
'fight' becomes 'scrap' (a scrap is a minor fight).
'the press' becomes 'iron' (I've seen this before).
'scrap'+'iron'='SCRAP-IRON'
'using' is the link.
Can you help me to learn more?
(Another definition for scrap-iron that I've seen is " Waste metal for melting down".)