Crossword Genius

Old iron, say (7)

Ross

I believe the answer is:

express

'say' is the definition.
(thesaurus)

'old iron' is the wordplay.
'old' becomes 'ex'.
'iron' becomes 'press' (I've seen this before).
'ex'+'press'='EXPRESS'

(Other definitions for express that I've seen before include "Fast - state - train" , "Convey; high-speed" , "set forth" , "Speak - fast" , "Utter; speedy" .)

I've seen this clue in The Telegraph.
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