A meeting with minister for old dictator (4)
I believe the answer is:
amin
'for old dictator' is the definition.
(Idi Amin)
'a meeting with minister' is the wordplay.
'meeting with' is a charade indicator (letters next to each other).
'minister' becomes 'min' (abbreviation).
'a'+'min'='AMIN'
(Other definitions for amin that I've seen before include "'Idi ..., former Ugandan ruler (4)'" , "Ugandan dictator" , "Idi . . . . Once ruled Uganda tyrannically" , "'Last King of Scotland'" , "Dictator Idi --" .)