Home on time, salesperson I had found to be fearless (8)
I believe the answer is:
intrepid
'to be fearless' is the definition.
('intrepid' can be a synonym of 'fearless')
'home on time salesperson i had' is the wordplay.
'home' becomes 'in' (to be in is to be (at) home).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'time' becomes 't' (abbreviation).
'salesperson' becomes 'rep' (sales rep).
'i had' becomes 'i'd' (contraction).
'in'+'t'+'rep'+'id'='INTREPID'
'found' acts as a link.
(Other definitions for intrepid that I've seen before include "without fear" , "Invulnerable to fear" , "Audacious" , "Afraid not" , "Bold" .)