Pressed metal supplied by editor (6)
I believe the answer is:
ironed
'pressed' is the definition.
(similar in meaning)
'metal supplied by editor' is the wordplay.
'metal' becomes 'iron' (iron is a metal).
'supplied by' means one lot of letters go next to another.
'editor' becomes 'ed' (abbreviation).
'iron'+'ed'='IRONED'
(Other definitions for ironed that I've seen before include "Made smooth, shirt or collar" , "De Niro (anag)" , "flattened" , "prepared for 23 [WARDROBE] ?" , "Smoothed the cloth with heat" .)