Mean lad upset old statesman (7)

I believe the answer is:

mandela

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

'old statesman' is the definition.
'Mandela' can be an answer for 'statesman' (Nelson Mandela). I am not certain of the 'old' bit.

'mean lad upset' is the wordplay.
'upset' is an anagram indicator.
'mean'+'lad'='meanlad'
'meanlad' with letters rearranged gives 'MANDELA'.

Can you help me to learn more?

(Other definitions for mandela that I've seen before include "Former prisoner" , "Nelson lengthily detained" , "South African president, 1994-99" , "Former president of South Africa" , "Nelson --, South African politician" .)

I've seen this clue in The Sun.

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