Perhaps Thatcher's advice and negative comment given socialist spin (2,4,4)

I believe the answer is:

no left turn

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'perhaps thatcher's advice' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'and negative comment given socialist spin' is the wordplay.
'and' becomes 'n' (common abbreviation for 'and').
'negative comment given' becomes 'o' (I can't explain this - if you can you should believe this answer much more).
'socialist' becomes 'left' (associated in meaning).
'spin' becomes 'turn' (I've seen this in other clues).
'n'+'o'+'left'+'turn'='NO LEFT TURN'

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I've seen this clue in The Guardian.

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