Crossword Genius

I start to recover assigned to stern (4)

Ross

I believe the answer is:

iron

I'm a little stuck... Click here to teach me more about this clue!

'to stern' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for iron that I've seen before include "See 14" , "Heavy metal that rusts easily" , "sports club" , "Fe - golf club" , "rations in emergency?" .)

I've seen this clue in The Times and The Sunday Times.
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