Northern funk personally genuine (6)
I believe the answer is:
'northern' is the definition.
(similar in meaning)
'funk personally genuine' is the wordplay.
'funk personally' becomes 'bo' (I can't explain this - if you can you should give a lot more credence to this answer).
'genuine' becomes 'real' (associated in meaning).
Can you help me to learn more?
(Other definitions for boreal that I've seen before include "Related to the northern lights" , "Relating to qualities associated with the north wind" .)