Nearly with spring approaching (4-4)
I believe the answer is:
well-nigh
'nearly' is the definition.
('well-nigh' can be a synonym of 'nearly')
'spring approaching' is the subsidiary indication.
'spring' becomes 'well' (I've seen this before).
'approaching' becomes 'nigh' (I've seen this before).
'well'+'nigh'='wellnigh'
'with' is the link.
(Other definitions for well-nigh that I've seen before include "Amost, very nearly" , "Healthy plus near = almost" .)