Radio about your start in dictatorship (7)
I believe the answer is:
tyranny
'dictatorship' is the definition.
(I know that dictatorship can be written as tyranny)
'radio about your start' is the wordplay.
'radio' becomes 'tranny' (short for transistor radio).
'about' indicates putting letters inside.
'start' says to take the initial letters.
The first letter of 'your' is 'y'.
'tranny' placed around 'y' is 'TYRANNY'.
'in' is the link.
(Other definitions for tyranny that I've seen before include "Cruel government" , "Reign of terror" , "Dominance through threat of punishment and violence" , "Dictatorship" , "Despotic rule" .)