Chaos from PM on edge (6)
I believe the answer is:
mayhem
'chaos' is the definition.
(thesaurus)
'pm on edge' is the wordplay.
'pm' becomes 'may' (Theresa May).
'on' says to put letters next to each other.
'edge' becomes 'hem' (I've seen this before).
'may'+'hem'='MAYHEM'
'from' is the link.
(Other definitions for mayhem that I've seen before include "Havoc, violent disturbance" , "Chaos, confusion, destruction" , "Violent or damaging action, a crime" , "Violent destruction of confusion" , "wild state" .)