Labour movement's endless reproach about Murdoch? (8)

I believe the answer is:

blairism

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'labour movement's' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'endless reproach about murdoch?' is the wordplay.
'endless' means to remove the last letter.
'reproach' becomes 'blame' (blame is a kind of reproach).
'about' means one lot of letters goes inside another.
'murdoch?' becomes 'Iris' (author Iris Murdoch).
'blame' with its final letter taken off is 'blam'.
'blam' placed around 'iris' is 'BLAIRISM'.

Can you help me to learn more?

I've seen this clue in The Independent.

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