In switching on, is creating trouble for oneself (8,9)

I think it could be either:

Which length description are you looking for?:

8,9

17*

starting something

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'in switching on' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'creating trouble for oneself' is the wordplay.
I cannot really understand how this works, but
'creating' could be 'starting' (starting is a kind of creating) and 'starting' is found in the answer.
The remaining letters 'something' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'is' is the link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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