Mind of foreign spy suffering after killing leader (6)

I believe the answer is:

psyche

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'mind' is the definition.
(synonyms)

'foreign spy suffering after killing leader' is the wordplay.
'foreign' indicates anagramming the letters (foreign order of the letters).
'suffering after killing leader' becomes 'che' (I can't justify this - if you can you should give a lot more credence to this answer).
'spy' anagrammed gives 'psy'.
'psy'+'che'='PSYCHE'

'of' is the link.

Can you help me to learn more?

(Other definitions for psyche that I've seen before include "Analyse" , "The beloved of Eros" , "Soul; Cupid loved her" , "Soul - girl from Greek mythology" , "Innermost self" .)

I've seen this clue in The Hindu.

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