Crossword Genius

Mad dictator imprisons fanatical devotee (6)

Ross

I believe the answer is:

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

'fanatical devotee' is the definition.
(I've seen this before)

'mad dictator imprisons' is the wordplay.
'ADDICT' is hidden in amongst the letters.
However, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for addict that I've seen before include "Habitual drug user", "Person compulsively given to taking drugs", "One hooked on drugs", "Victim of habit", "One dependent on drugs".)

I've seen this clue in The Telegraph.