The Commonwealth: it could hardly be more distant from Britain (9)
I believe the answer is:
australia
This clue might be a double definition.
'the commonwealth' is the first definition.
(I've seen this before)
'it could hardly be more distant from britain' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for australia that I've seen before include "Derby winner" , "The golden wattle is its national flower" , "English speaking nation" , "Norfolk and Christmas Islands belong to it" , "big country" .)