Pole is in good time or just about (6)
I believe the answer is:
Here is my best explanation:
'just about' is the definition.
('nearly' can be a synonym of 'just about')
'pole is in good time' is the subsidiary indication.
'pole' becomes 'n'.
'is in good time' becomes 'early' (being early is arriving in good time).
'or' is the link.
(Other definitions for nearly that I've seen before include "parsimoniously", "Almost, well-nigh", "Close", "Give out a bright light", "Not entirely", "approximately", "It's almost", "Not quite, almost", "Well-nigh" and "Noon at eleven fifty nine am".)