Spooner’s ideal skin colour gets international agreement (4,3)
I believe the answer is:
test ban
'international agreement' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for test ban that I've seen before include "Battens (anag.)" , "International agreement concerning nuclear weapons" , "international bar" , "Prohibition on trying out atomic bombs" , "ignorant students might favour?" .)