It's humiliating to be ordered to alight (8)
I believe the answer is:
comedown
'it's humiliating' is the definition.
(I've seen this before)
'be ordered to alight' is the wordplay.
I cannot quite see how this works, but
'be' could be 'come' (coming is a kind of being) and 'come' is found in the answer.
The remaining letters 'down' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for comedown that I've seen before include "Decrease" , "Anticlimax" , "Do cowmen experience a loss of status?" , "Feeling of disappointment" , "Loss of position or status" .)