Possibly treaties meet with anger, rioting and touch of sadness (10)
I believe the answer is:
agreements
'possibly treaties' is the definition.
I can't judge whether this defines the answer.
'meet with anger rioting and touch of sadness' is the wordplay.
'with' says to put letters next to each other.
'rioting' is an anagram indicator.
'and' says to put letters next to each other.
'touch of' suggests taking the first letters.
The initial letter of 'sadness' is 's'.
'meet'+'anger'='meetanger'
'meetanger' anagrammed gives 'agreement'.
'agreement'+'s'='AGREEMENTS'
Can you help me to learn more?
(Other definitions for agreements that I've seen before include "contracts" , "pledges" , "Compromises in" , "Concerts" .)