Insert my surprising strategy to destroy political party from inside (8)

I believe the answer is:

entryism

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'strategy to destroy political party from inside' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'insert my surprising' is the wordplay.
'surprising' indicates an anagram.
'insert'+'my'='insertmy'
'insertmy' with letters rearranged gives 'ENTRYISM'.

Can you help me to learn more?

(Another definition for entryism that I've seen is " Infiltration of a political party for subversion".)

I've seen this clue in The Irish Times.

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