Problematic getting deity to Norway's borders (6)
I believe the answer is:
thorny
'problematic' is the definition.
(I've seen this before)
'deity to norway's borders' is the wordplay.
'deity' becomes 'thor' (Thor is an example).
'borders' means to remove the middle letters (only the edge or border letters remain).
'norway' with its centre removed is 'ny'.
'thor'+'ny'='THORNY'
'getting' is the link.
(Other definitions for thorny that I've seen before include "Unpleasant" , "(Of problem) causing difficulty; prickly" , "Prickly, problematic" , "Problematic; having spines" , "Problematic; spiny" .)