Humiliation it is for a rider to take a toss? (8)
I believe the answer is:
comedown
'humiliation' is the definition.
(comedown is a kind of humiliation)
'it is for a rider to take a toss?' is the wordplay.
I cannot really understand how this works, but
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is located in the answer.
'take' could be 'do' (eg taking or doing drugs) and 'do' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for comedown that I've seen before include "Descent to a lower status" , "Loss of position or status" , "Feeling of disappointment" , "Anticlimax" , "Decrease" .)