Person of colour accepting English ideal of moderation (6,4)
I believe the answer is:
golden mean
'ideal of moderation' is the definition.
(philosophical term)
'person of colour accepting english' is the wordplay.
I cannot really understand how this works, but
'person' could be 'old' (old person is a kind of person) and 'old' is present in the answer.
'english' could be 'e' (abbreviation) and 'e' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for golden mean that I've seen before include "ideal proportions" , "middle course" , "Ideal position between two extremes" , "Perfect compromise" .)