Genial wag moving from the west (9)

I believe the answer is:

galwegian

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'west' is the definition.
Although both the answer and definition are adjectives, I don't see how one could define the other.

'genial wag moving' is the wordplay.
'moving' is an anagram indicator (letters are moved around).
'genial'+'wag'='genialwag'
'genialwag' is an anagram of 'GALWEGIAN'.

'from the' is the link.

Can you help me to learn more?

(Another definition for galwegian that I've seen is " Irish".)

I've seen this clue in The Irish Times.

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