Former leader, second-class, getting money from Iran returned (5)
I believe the answer is:
blair
'former leader' is the definition.
(I've seen this before)
'second-class getting money from iran returned' is the wordplay.
'second class' becomes 'b'.
'getting' means one lot of letters go next to another.
'money from iran' becomes 'rial' (I am not sure about this - if you are sure you should believe this answer much more).
'returned' says the letters should be written backwards.
'rial' back-to-front is 'lair'.
'b'+'lair'='BLAIR'
Can you help me to learn more?
(Other definitions for blair that I've seen before include "Labour leader from 1994" , "He followed Smith as party leader" , "Was this prime minister a Libra?" , "George Orwell's actual family name" , "A political leader" .)