Motorcycle to score badly (7)
I believe the answer is:
scooter
'motorcycle' is the definition.
(I've seen this before)
'to score badly' is the wordplay.
'badly' indicates an anagram (letters in the wrong order).
'to'+'score'='toscore'
'toscore' is an anagram of 'SCOOTER'.
(Other definitions for scooter that I've seen before include "Light motorcycle" , "Wheeled board with steering handle" , "Small motorcycle" , "one makes off quickly" , "motor transport" .)