Crossword Genius

Enemy has iron ring hidden (3)

Ross

I believe the answer is:

foe

'enemy' is the definition.
(synonyms)

'iron ring hidden' is the wordplay.
'iron' becomes 'Fe' (Fe is the chemical symbol for iron).
'ring' becomes 'o' (letter resembling a ring).
'hidden' indicates putting letters inside.
'fe' going around 'o' is 'FOE'.

'has' is the link.

(Other definitions for foe that I've seen before include "Opponent" , "Am archaic enemy" , "Environmentalists" , "Evil rival" , "Someone opposing" .)

I've seen this clue in The Mirror.
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