Drink with Irish patron in Ulster town (11)

I believe the answer is:

downpatrick

'ulster town' is the definition.
(town in County Down, Ulster)

'drink with irish patron' is the wordplay.
'drink' becomes 'down' (to down something can mean to drink it quickly).
'with' is a charade indicator (letters next to each other).
'irish patron' becomes 'Patrick' (St Patrick, patron saint of Ireland).
'down'+'patrick'='DOWNPATRICK'

'in' acts as a link.

I've seen this clue in The Guardian.

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