A doctor for all to see with unusually clean vehicle for patients (9)
I believe the answer is:
ambulance
'vehicle for patients' is the definition.
(vehicle for transporting patients to hospital)
'a doctor for all to see with unusually clean' is the wordplay.
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'for all' becomes 'U' (Universal film certificate - suitable for all).
'to see with' is a charade indicator (letters next to each other).
'unusually' is an anagram indicator.
'clean' with letters rearranged gives 'lance'.
'a'+'mb'+'u'+'lance'='AMBULANCE'
(Other definitions for ambulance that I've seen before include "It will bring you to hospital" , "Vehicle for transport to hospital" , "Transport for the sick" , "mobile medical unit" , "one seen by accident" .)