Little old car with no right to be on the M1? (5)
I believe the answer is:
minor
'little' is the definition.
(similar in meaning)
'no right to be on the m1?' is the wordplay.
'right' becomes 'r' (common abbreviation).
'to be on' is a charade indicator (letters next to each other).
'the m1?' becomes 'mi' (resembles M1).
'no'+'r'='nor'
'nor' after 'mi' is 'MINOR'.
'old car with' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for minor that I've seen before include "Of less importance" , "One hasn't reached legal majority" , "Inconsequential" , "Small-scale - child" , "Unimportant or unable to vote" .)