Everyone is seen after fine trip (4)
I believe the answer is:
fall
'trip' is the definition.
(trip can mean to fall over)
'everyone is seen after fine' is the wordplay.
'everyone' becomes 'all' (all people).
'is seen after' is a charade indicator (letters next to each other).
'fine' becomes 'f' (abbreviation in pencil classifications).
'all' after 'f' is 'FALL'.
(Other definitions for fall that I've seen before include "Drop; autumn" , "Autumn in the USA" , "three months in America" , "Rapid descent" , "What Americans call autumn" .)