Editor with vim not exactly soporific (9)

I believe the answer is:

dormitive

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

'editor with vim not exactly' is the wordplay.
'with' is a charade indicator (letters next to each other).
'not exactly' is an anagram indicator.
'editor'+'vim'='editorvim'
'editorvim' is an anagram of 'DORMITIVE'.

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I've seen this clue in The Telegraph.

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