Socialist in Caracas: Trotskyist? (6)

I believe the answer is:

castro

'socialist' is the definition.
(Fidel Castro, former president of Cuba)

'in caracas trotskyist?' is the wordplay.
'in' says the answer is hidden in the clue.
'CASTRO' can be found hidden inside 'caracas trotskyist'.

(Other definitions for castro that I've seen before include "Fidel or Raul" , "Cuba's chief Fidel" , "He's late" , "Old leader" , "revolutionary leader" .)

I've seen this clue in The Everyman puzzle in The Observer.

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