Like an aristocrat perhaps to be in plenty of time? (5)
I believe the answer is:
early
This clue is a double definition.
'like an aristocrat perhaps' is the first definition.
(like an earl)
'in plenty of time?' is the second definition.
(arriving with time to spare)
'to be' acts as a link.
(Other definitions for early that I've seen before include "Before the usual time" , "'The ..... bird catches the worm'" , "at start of day" , "with time to spare?" , "near beginning" .)