Shocking and unsafe: LA star moving houses over this? (3,7,5)

I believe the answer is:

san andreas fault

'moving houses over this?' is the definition.
(place where houses may move during an earthquake)

'shocking and unsafe la star' is the wordplay.
'shocking' indicates anagramming the letters (I've seen this in other clues).
'and'+'unsafe'+'la'+'star'='andunsafelastar'
'andunsafelastar' with letters rearranged gives 'SAN ANDREAS FAULT'.

(Another definition for san andreas fault that I've seen is " area of instability".)

I've seen this clue in The Guardian.

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