Unreasonable concern about second uprising (3,4)
I believe the answer is:
too much
'unreasonable' is the definition.
(thesaurus)
'concern about second uprising' is the wordplay.
'concern' becomes 'touch' (synonyms).
'about' indicates putting letters inside.
'second uprising' becomes 'om' (I can't explain this - if you can you should believe this answer much more).
'touch' going around 'om' is 'TOO MUCH'.
Can you help me to learn more?
(Other definitions for too much that I've seen before include "More than is tolerable" , "Excessive, overwhelming" , "Excess, more than is needed" , "Excessive amount - far out!" , "Existing in excessive quantity" .)