Herb sped out of control in quiet area of W London (9,4)

I believe the answer is:

shepherd's bush

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

'area of w london' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'herb sped out of control in quiet' is the wordplay.
'out of control' indicates an anagram.
'in' is an insertion indicator.
'quiet' becomes 'shush' (I've seen this in another clue).
'herb'+'sped'='herbsped'
'herbsped' with letters rearranged gives 'epherdsb'.
'epherdsb' going within 'shush' is 'SHEPHERDS BUSH'.

Can you help me to learn more?

(Another definition for shepherd's bush that I've seen is " West London district".)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app