Notion of time still coming first (7)
I believe the answer is:
thought
'notion' is the definition.
(I've seen this before)
'time still coming first' is the wordplay.
'time' becomes 't' (abbreviation).
'still' becomes 'though'.
'coming first' means one lot of letters go next to another.
't' after 'though' is 'THOUGHT'.
'of' is the link.
(Other definitions for thought that I've seen before include "Meditation" , "Thinking process" , "Pensee; consideration" , "Supposed" , "Deliberation" .)