Redesigned motor, line for the future (8)
I believe the answer is:
tomorrow
'the future' is the definition.
(tomorrow is a kind of future)
'redesigned motor line' is the wordplay.
'redesigned' indicates an anagram.
'line' becomes 'row' (row is a kind of line**).
'motor' anagrammed gives 'tomor'.
'tomor'+'row'='TOMORROW'
'for' acts as a link.
(Other definitions for tomorrow that I've seen before include "coming soon" , "In the near future" , "It's manana in Spain" , "In 24-hours time" , "Day after today" .)