Analysis of Pluto zone (10)

I believe the answer is:

dissection

'analysis' is the definition.
(dissection is a kind of analysis)

'pluto zone' is the wordplay.
'pluto' becomes 'dis' (another name for the mythical god).
'zone' becomes 'section'.
'dis'+'section'='DISSECTION'

'of' acts as a link.

I've seen this clue in The Guardian.

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