Military leader from Iron Age rejected separately (7)

I believe the answer is:

noriega

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'separately' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'military leader from iron age rejected' is the wordplay.
'military' becomes 'nor' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'leader from' suggests taking the first letters (I've seen 'leaders from' mean this).
'rejected' says the letters should be written backwards.
The first letter of 'iron' is 'i'.
'age' in reverse letter order is 'ega'.
'nor'+'i'+'ega'='NORIEGA'

Can you help me to learn more?

(Other definitions for noriega that I've seen before include "Panamanian general and president, convicted of drug trafficking in 1992" , "Panamanian dictator deposed by the USA in 1989" .)

I've seen this clue in The Independent.

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