Starter for Ted Heath's touring car (5)
I believe the answer is:
motor
'car' is the definition.
(motor can informally mean a car)
'starter for ted heath's touring' is the wordplay.
'starter for' suggests taking the first letters.
'heath' becomes 'moor' (both can mean a type of landscape).
'touring' means one lot of letters goes inside another (tour can mean to go around).
The first letter of 'ted' is 't'.
't' inserted into 'moor' is 'MOTOR'.
(Other definitions for motor that I've seen before include "Car (informal)" , "Internal combustion engine" , "Car; powered machine" , "Car (colloq,)" , "Engine of vehicle" .)