Parking car so, I disturbed pedestrian (7)
I believe the answer is:
prosaic
'pedestrian' is the definition.
('prosaic' can be a synonym of 'pedestrian')
'parking car so i disturbed' is the wordplay.
'parking' becomes 'p'.
'disturbed' indicates an anagram.
'car'+'so'+'i'='carsoi'
'carsoi' anagrammed gives 'rosaic'.
'p'+'rosaic'='PROSAIC'
(Other definitions for prosaic that I've seen before include "Ordinary - not poetical" , "Is a crop (anag) - unimaginative" , "Lacking originality" , "Unimaginative - air cops (anag)" , "uninspired" .)