Crossword Genius

Spirit generously opened by party-giver (5)

Ross

I believe the answer is:

ghost

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

'spirit' is the definition.
(spirit can mean a ghost)

'generously opened by party-giver' is the wordplay.
'generously opened' becomes 'g' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'by' is a charade indicator (letters next to each other).
'party-giver' becomes 'host' (I've seen this in another clue).
'g'+'host'='GHOST'

Can you help me to learn more?

(Other definitions for ghost that I've seen before include "who has a haunting act?" , "Spectre, wraith" , "Phantom" , "Spirit of the dead" , "Supernatural apparition" .)

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