Car to avoid on the motorway, initially (6)
I believe the answer is:
dodgem
'car' is the definition.
(I've seen this before)
'avoid on the motorway initially' is the wordplay.
'avoid' becomes 'dodge' (dodging is a kind of avoiding).
'on' means one lot of letters go next to another.
'initially' says to take the initial letters.
The initial letter of 'motorway' is 'm'.
'dodge'+'m'='DODGEM'
'to' is the link.
(Other definitions for dodgem that I've seen before include "Car used in fairground" , "Electric car" , "Small car at funfair for bumping into others" , "Bumper car" , "ride - with 14a" .)