Loose change around exposed northern city (10)
I believe the answer is:
copenhagen
'northern city' is the definition.
'copenhagen' can be an answer for 'city' (Copenhagen is an example). I'm unsure of the 'northern' bit.
'loose change around exposed' is the wordplay.
'loose' indicates an anagram (letters are loosened from their original positions).
'around' is an insertion indicator.
'exposed' becomes 'open' (synonyms).
'change' with letters rearranged gives 'chagen'.
'chagen' placed around 'open' is 'COPENHAGEN'.
Can you help me to learn more?
(Other definitions for copenhagen that I've seen before include "European capital" , "Danish capital" , "below Wellington" , "Capital - Wellington's warhorse" , "Capital - battle won by 15" .)