I assume you are specifically interested in shopping for clothing. But I can't pass up offering a couple of non-clothing suggestions. For some really cool (if admittedly expensive) Irish-made pottery from different studios around the country, try the Kilkenny shop on Nassau St.
Also, if you like Irish Whiskey or know someone who does, Mitchell & Son's on Kildare St. have a proprietary brand called Green Spot (made for them by Jameson, but available practically nowhere else, not even in the airport Duty Free). Also not cheap, but quite an enjoyable whiskey...
Also, if you like Irish Whiskey or know someone who does, Mitchell & Son's on Kildare St. have a proprietary brand called Green Spot (made for them by Jameson, but available practically nowhere else, not even in the airport Duty Free). Also not cheap, but quite an enjoyable whiskey...