Insurrection regarded as somewhat unpatriotic (4)
I believe the answer is:
riot
'insurrection' is the definition.
(I've seen this in another clue)
'somewhat unpatriotic' is the wordplay.
'somewhat' says the answer is hidden in the clue.
'RIOT' is hidden in the letters of 'unpatriotic'.
'regarded as' acts as a link.
(Other definitions for riot that I've seen before include "Public act of violence by an unruly mob" , "Uprising" , "The unruly may run this" , "A public affray or disturbance" , "Rowdy behaviour" .)