Criticise terrible roads - shock source of troubles? (8,3)

I believe the answer is:

pandoras jar

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'source of troubles?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'criticise terrible roads shock' is the wordplay.
'criticise' becomes 'pan' (informal term meaning to criticise heavily).
'terrible' indicates anagramming the letters.
'shock' becomes 'jar' (both can mean to shake).
'roads' is an anagram of 'doras'.
'pan'+'doras'+'jar'='PANDORAS JAR'

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