Crossword Genius

In politics, it never has a completely happy ending (5)

Ross

I believe the answer is:

party

I'm a little stuck... Click here to teach me more about this clue!

'completely happy ending' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'in politics it never has a' is the wordplay.
I cannot really see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is located in the answer.
'a' is present in the answer.
The remaining letters 'pry' is a valid word 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 party that I've seen before include "Political organization" , "festive" , "Celebratory social gathering" , "Political organisation" , "Crew" .)

I've seen this clue in the Evening Standard.
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