From Tehran, someone's release (6)

I believe the answer is:

ransom

'release' is the definition.
(thesaurus)

'from tehran someone's' is the wordplay.
'from' says the answer is hidden in the clue.
'RANSOM' is hidden in the letters of 'tehran someone'.

(Other definitions for ransom that I've seen before include "Manors (anag.)" , "Kidnapper's demand" , "Money demand" , "demand an extortionate price" , "Ready to release prisoner" .)

I've seen this clue in The Telegraph.

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