One hooked and held by mad dictator (6)
I believe the answer is:
addict
'one hooked' is the definition.
(I've seen this before)
'held by mad dictator' is the wordplay.
'held by' says the answer is hidden in the clue.
'ADDICT' can be found hidden inside 'mad dictator'.
'and' acts as a link.
(Other definitions for addict that I've seen before include "Make dependent" , "Person with compulsive dependence on drugs" , "fiend" , "Overly-dependent person" , "Junkie, substance abuser" .)