Modern Greenland confused by a citizen of America from the east coast (3,9)
I believe the answer is:
new englander
'a citizen of america from the east coast' is the definition.
I can't judge whether this definition defines the answer.
'modern greenland confused by' is the wordplay.
'modern' becomes 'new' ('new' is associated in meaning with 'modern').
'confused' is an anagram indicator.
'by' means one lot of letters go next to another.
'greenland' with letters rearranged gives 'englander'.
'new'+'englander'='NEW ENGLANDER'
Can you help me to learn more?
(Other definitions for new englander that I've seen before include "someone from Manchester or Cambridge?" , "Bostonian, say" , "Some American" .)