Disagreements first resolved (5)
I believe the answer is:
rifts
'disagreements' is the definition.
(I've seen this in another clue)
'first resolved' is the wordplay.
'resolved' indicates anagramming the letters.
'first' anagrammed gives 'RIFTS'.
(Other definitions for rifts that I've seen before include "Deep divides" , "Schisms" , "Splits" , "differences ..." , "Clefts in earth, or disagreements" .)