After accident had no motorcycle (5)
I believe the answer is:
honda
'motorcycle' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see an association between them that I don't see?
'after accident had no' is the wordplay.
'after accident' indicates anagramming the letters (I've seen this in other clues).
'had'+'no'='hadno'
'hadno' with letters rearranged gives 'HONDA'.
Can you help me to learn more?
(Another definition for honda that I've seen is " Japanese car firm".)