Manner in which food initially reaches a traveller (8)
I believe the answer is:
wayfarer
'a traveller' is the definition.
(I know that wayfarer is a type of traveller)
'manner in which food initially reaches' is the wordplay.
'manner in which' becomes 'way' (way or manner in which something is done).
'food' becomes 'fare' (fare is a kind of food).
'initially' says to take the initial letters.
The initial letter of 'reaches' is 'r'.
'way'+'fare'+'r'='WAYFARER'
(Other definitions for wayfarer that I've seen before include "Bird of passage" , "One walking" , "Person on a journey - sailing dinghy" , "One journeying on foot" , "Traveller, especially on foot" .)