What's left of IOM biking event banning one ton? (6)
I believe the answer is:
traces
'what's left of iom biking' is the definition.
I can't tell whether this definition defines the answer.
'event banning one ton?' is the wordplay.
I cannot really see how this works, but
'event' could be 'race' (race is a kind of event) and 'race' is present in the answer.
'ton?' could be 't' (abbreviation) and 't' is found within the answer.
A single letter 's' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for traces that I've seen before include "Slight indications on parts of the harness" , "Just detectable amounts" , "Finds; small quantities" , "Tracks down or outlines" , "Finds; signs" .)