Officially approved scheme ultimately run by mob (8)

I believe the answer is:

stampede

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

'run by mob' is the definition.
'stampede' can be an answer for 'run' (I've seen this before). I am unsure of the 'by mob' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for stampede that I've seen before include "Sudden panicked rush" , "Uncontrolled rush" , "herd scatter wildly" , "Beastly charge" , "Put to flight" .)

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