Delivery man back at roadside endlessly (6)
I believe the answer is:
yorker
'delivery' is the definition.
(I've seen this before)
'back at roadside endlessly' is the wordplay.
'back' shows that the letters should be reversed in order.
'at' becomes 'roy' (I can't justify this - if you can you should believe this answer much more).
'roadside' becomes 'kerb' (I've seen this before).
'endlessly' means to remove the last letter.
'roy' reversed gives 'yor'.
'kerb' with its last letter taken away is 'ker'.
'yor'+'ker'='YORKER'
'man' acts as a link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for yorker that I've seen before include "Difficult cricket delivery to play" , "Cricket ball pitched to the bat" , "Cricket delivery, pitching under the bat" , "Ball pitching just under bat (cricket)" , "Bowler's delivery type" .)