One in coach, perhaps, sees prang round the bend (9)
I believe the answer is:
passenger
'one in coach perhaps' is the definition.
(someone travelling by coach)
'sees prang round the bend' is the wordplay.
'round the bend' indicates an anagram.
'sees'+'prang'='seesprang'
'seesprang' with letters rearranged gives 'PASSENGER'.
(Other definitions for passenger that I've seen before include "One on a train perhaps" , "One travelling" , "one's carried" , "burden to the team" , "Traveller in a vehicle driven by someone else" .)