Be able to, now you're got electricity installed (4,3,5)

I believe the answer is:

have the power

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

'installed' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'be able to now you're got electricity' is the wordplay.
I cannot really see how this works, but
'be' could be 'vet' (vetting is a kind of being) and 'vet' is located in the answer.
'electricity' could be 'power' (I've seen this in another clue) and 'power' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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