Crossword Genius

Emperor once turned on a dreaded follower? (5)

Ross

I believe the answer is:

rasta

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'dreaded follower?' is the definition.
'rasta' can be an answer for 'follower?' (I have seen 'Follower of Rastafarianism ' mean 'rasta' so perhaps 'follower' could also mean 'rasta'). I am not certain of the 'dreaded' bit.

'emperor once turned on a' is the wordplay.
'emperor' becomes 'tsar' (I've seen this before).
'once turned' shows that the letters should be reversed in order.
'on' means one lot of letters go next to another.
'tsar' backwards is 'rast'.
'rast'+'a'='RASTA'

Can you help me to learn more?

(Other definitions for rasta that I've seen before include "One dreaded" , "Jamaican cult follower (informally)" , "Jamaican sect member" , "A certain believer" , "Dreadlocked person (abbr.)" .)

I've seen this clue in The Independent.
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