Almost in Norway before the due time (6)
I believe the answer is:
nearly
'almost' is the definition.
('nearly' can be a synonym of 'almost')
'norway before the due time' is the wordplay.
'norway' becomes 'n'.
'before the due time' becomes 'early' (I've seen this before).
'n'+'early'='NEARLY'
'in' is the link.
(Other definitions for nearly that I've seen before include "Almost, well-nigh" , "Noon at eleven fifty nine am" , "parsimoniously" , "Not entirely" , "Close" .)