Not to agree to a full distribution (4,3)
I believe the answer is:
fall out
'not to agree' is the definition.
I can't judge whether this defines the answer.
'to a full distribution' is the wordplay.
'distribution' is an anagram indicator.
'to'+'a'+'full'='toafull'
'toafull' with letters rearranged gives 'FALL-OUT'.
Can you help me to learn more?
(Other definitions for fall out that I've seen before include "Happen" , "Quarrel - leave the ranks" , "disagree" , "Radioactive pollution" .)