Failing party upheld protest march? (6)

I believe the answer is:

doomed

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'failing party upheld protest march?' is the definition.
I can't tell whether this definition defines the answer.

'failing party upheld protest' is the wordplay.
'failing party' becomes 'do' (do is a kind of party. I am not sure about the 'failing' bit.).
'upheld' is a reversal indicator.
'protest' becomes 'demo' (demonstration).
'demo' written backwards gives 'omed'.
'do'+'omed'='DOOMED'

Can you help me to learn more?

(Other definitions for doomed that I've seen before include "Greek god" , "Destined to a grim fate, perhaps hell (6)" , "Ill-fated" , "Condemned to hell" , "Under sentence" .)

I've seen this clue in The Independent.

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