No car, but a start in business (3)
I believe the answer is:
bus
'no car' is the definition.
'bus' can be an answer for 'car' (bus is a kind of car). I am unsure of the 'no' bit.
'but a start in business' is the wordplay.
'a start' means to remove the last letter (I've seen 'starts' mean this).
'in business' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'but' with its final letter removed is 'bu'.
'bu'+'s'='BUS'
Can you help me to learn more?
(Other definitions for bus that I've seen before include "Charabanc" , "Coach" , "Large passenger vehicle - small business!" , "Motor-coach" , "Public service vehicle" .)