Press made of metal (4)
I believe the answer is:
iron
I believe this is a double definition.
'press' is the first definition.
(ironing is a kind of pressing)
'metal' is the second definition.
(iron is a kind of metal)
'made of' acts as a link.
(Other definitions for iron that I've seen before include "Magnetic metallic element" , "Smooth things" , "great strength" , "Box-shaped instrument of torture -- no meridian (anag)" , "Smooth (clothes)" .)