Lots dismissing new border chaos (6)
I believe the answer is:
mayhem
'chaos' is the definition.
(thesaurus)
'lots dismissing new border' is the wordplay.
'lots' becomes 'm'.
'dismissing new' becomes 'ay' (I can't explain this - if you can you should believe this answer much more).
'border' becomes 'hem' (I've seen this before).
'm'+'ay'+'hem'='MAYHEM'
Can you help me to learn more?
(Other definitions for mayhem that I've seen before include "Pandemonium" , "Violent or damaging action, a crime" , "wild state" , "State of great confusion and disorder" , "Violent damage, chaos" .)