Crossword Genius

Party for college jerk is out of this world (8)

Ross

I believe the answer is:

galactic

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'out of this world' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

'party for college jerk' is the wordplay.
'party' becomes 'gala' (I've seen this before**).
'for' says to put letters next to each other.
'college' becomes 'c'.
'jerk' becomes 'tic' (I've seen this before).
'gala'+'c'+'tic'='GALACTIC'

'is' is the link.

Can you help me to learn more?

(Other definitions for galactic that I've seen before include "More than stellar" , "Of independent system of stars in space" , "Relating to large star systems" , "Relating to, eg, the Milky Way" , "Referring to the star system" .)

I've seen this clue in the Irish Times.
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