Alpine club disbanded is not to blame (10)

I believe the answer is:

inculpable

I'm a little stuck... Click here to teach me more about this clue!

'not to blame' is the definition.
I can't tell whether this defines the answer.

'alpine club disbanded' is the wordplay.
'alpine club' anagrams to 'INCULPABLE'.
But, I'm not clear how the anagram is indicated.

'is' is the link.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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