Involved in space, spoke roughly (9)

I believe the answer is:

ensnarled

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'involved' is the definition.
Although both the answer and definition are past participle verbs, I can't understand how one could define the other.

'space spoke roughly' is the wordplay.
'space' becomes 'en' (in printing, a space as wide as a letter 'n').
'spoke roughly' becomes 'snarled' (snarling is a kind of speaking. I am not sure about the 'roughly' bit.).
'en'+'snarled'='ENSNARLED'

'in' is the link.

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I've seen this clue in The Daily Express.

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