Wanton destruction can possibly be found on the border (6)
I believe the answer is:
mayhem
'wanton destruction' is the definition.
(I've seen this in another clue)
'can possibly be found on the border' is the wordplay.
'can possibly' becomes 'may' (synonyms. I am not sure about the 'possibly' bit.).
'be found on' means one lot of letters go next to another.
'the border' becomes 'hem' (I've seen this before).
'may'+'hem'='MAYHEM'
Can you help me to learn more?
(Other definitions for mayhem that I've seen before include "violence" , "Carnage" , "Violent or damaging action, a crime" , "Havoc - chaos" , "Extreme disorder" .)