Repackaged Sky item about retired fighter (4,5)

I believe the answer is:

mike tyson

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

'fighter' is the definition.
(I know that Mike Tyson is a professional boxer)

'repackaged sky item about' is the wordplay.
'repackaged' is an anagram indicator (I've seen this in other clues).
'about' becomes 'on' (as in a book 'on' a certain topic).
'sky'+'item'='skyitem'
'skyitem' with letters rearranged gives 'miketys'.
'miketys'+'on'='MIKE TYSON'

'retired' is the link.
This may not be correct. It may belong to another bit of the clue.

Can you help me to learn more?

(Another definition for mike tyson that I've seen is " Boxer - time, yonks (anag)".)

I've seen this clue in The Independent.

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