Crossword Genius

Abandoned soul in political vision (7,8)

Ross

I believe the answer is:

optical illusion

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'vision' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'abandoned soul in political' is the wordplay.
'abandoned' indicates anagramming the letters.
'soul'+'in'+'political'='soulinpolitical'
'soulinpolitical' is an anagram of 'OPTICAL ILLUSION'.

Can you help me to learn more?

(Other definitions for optical illusion that I've seen before include "One can't really see it" , "Mirage" , "It's not what it seems!" , "trick" , "outwardly deceptive" .)

I've seen this clue in The Independent.
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