Crossword Genius

Added salt of copper — revolutionary! (5)

Ross

I believe the answer is:

cured

'added salt' is the definition.
(as in cured meats)

'copper revolutionary' is the wordplay.
'copper' becomes 'Cu' (chemical symbol).
'revolutionary' becomes 'red' (red can informally mean communist).
'cu'+'red'='CURED'

'of' acts as a link.

(Other definitions for cured that I've seen before include "Healed - smoked" , "Rehabilitated" , "Preserved by drying, salting or smoking" , "Mended" , "Healed - preserved" .)

I've seen this clue in The Times.
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