Turn up at ten on the dot initially (6)
I believe the answer is:
attend
'turn up' is the definition.
(turn up at an event)
'at ten on the dot initially' is the wordplay.
'on' is a charade indicator (letters next to each other).
'initially' indicates taking the first letters.
The initial letter of 'dot' is 'd'.
'at'+'ten'+'d'='ATTEND'
(Other definitions for attend that I've seen before include "minister" , "Be present at, turn up" , "Show up" , "Take part in" , "visit" .)