Standard border in church's interior design component (6,6)
I believe the answer is:
colour scheme
'interior design component' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'standard border in church's' is the wordplay.
'standard' becomes 'colours' (colours can mean a flag or standard).
'border' becomes 'hem' (I've seen this before).
'in' means one lot of letters goes inside another.
'church' becomes 'CE' (Church of England).
'hem' going inside 'ce' is 'cheme'.
'colours'+'cheme'='COLOUR SCHEME'
Can you help me to learn more?
(Other definitions for colour scheme that I've seen before include "dictating arrangements for the flat, say" , "Interior decoration plan" , "Arrangement or combination of tones and hues" .)