Consequently present warning, of course on time (9)
I believe the answer is:
therefore
'consequently' is the definition.
(I've seen this before)
'present warning of course on time' is the wordplay.
'present' becomes 'here' (both can mean in attendance).
'warning of course' becomes 'fore' (used to warn of airborne balls on a golf course).
'on' is a charade indicator (letters next to each other).
'time' becomes 't' (abbreviation).
'here'+'fore'='herefore'
'herefore' put after 't' is 'THEREFORE'.
(Other definitions for therefore that I've seen before include "Ergo" , "It follows" , "In consequence" , "Thus" , "has a triangular formation in maths?" .)