Person protecting commercial vehicle in front? (8)
I believe the answer is:
vanguard
'front?' is the definition.
(I know that vanguard is a type of art movement)
'person protecting commercial vehicle' is the wordplay.
I cannot really see how this works, but
'person' could be 'guard' (guard is a kind of person) and 'guard' is present in the answer.
'vehicle' could be 'van' (van is a kind of vehicle) and 'van' is found within the answer.
No letters remain.
This explanation may well be incorrect...
'in' acts as a link.
(Other definitions for vanguard that I've seen before include "Leading units moving at the head of an army" , "Front of advancing army" , "Foremost part of advancing army" , "Position at the forefront of developments" , "Trail-blazer" .)