N Atlantic island, one originally colonised by large antelope (7)
I believe the answer is:
iceland
'n atlantic' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'island one originally colonised by large antelope' is the wordplay.
'island' becomes 'i' (geographical abbreviation).
'one originally' indicates taking the first letters.
'by' means one lot of letters go next to another.
'large antelope' becomes 'eland' (large African antelope).
The initial letter of 'colonised' is 'c'.
'i'+'c'+'eland'='ICELAND'
Can you help me to learn more?
(Other definitions for iceland that I've seen before include "The capital city is Reykjavik" , "North Atlantic country" , "Reykjavik's country" , "Former Danish colony" , "Its capital is Reykavik" .)