Disagreement on a question of colour? (5)
I believe the answer is:
clash
'disagreement' is the definition.
(I know that clash is a type of disagreement)
'on a question of colour?' is the wordplay.
'on' is a charade indicator (letters next to each other).
'a question of' becomes 'cl' (I can't explain this - if you can you should believe this answer much more).
'colour?' becomes 'ash' (I have seen 'Grey colour' mean 'ash' so perhaps 'colour' could also mean 'ash').
'cl'+'ash' is 'CLASH'.
Can you help me to learn more?
(Other definitions for clash that I've seen before include "Disagree violently" , "Come into violent conflict" , "Punk group; disagree" , "Collision (of colour)" , "jar" .)