Unrest when corrupt tories left the Euro (5)

I believe the answer is:

riots

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

'unrest' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

(Other definitions for riots that I've seen before include "Public disturbances" , "Protests" , "Violent disturbances" , "Acts of violence by unruly mobs" , "Wild disturbances by crowds" .)

I've seen this clue in the Sydney Morning Herald.

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