A loud hurrah for celebrations! (4,5)

I believe the answer is:

good cheer

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

'a loud' is the definition.
I can't judge whether this definition defines the answer.

'hurrah for celebrations' is the wordplay.
'hurrah' becomes 'cheer' (I've seen this before).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'celebrations' becomes 'good' (I am not sure about this - if you are sure you should believe this answer much more).
'cheer' put after 'good' is 'GOOD CHEER'.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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