Fashion: The tomboy queen of New York cool Jennifer Aniston can't get enough of her. She's advised Tommy Hilfiger on street cred. Now Daryl K is heading this way. Rebecca Lowthorpe meets the Dublin-born designer who's the toast of Manhattan

But fashion is more than a simple question of clothes, don't you think?" asks Daryl Kerrigan, or Daryl K, as her label is known. "Fashion is about a way of walking, thinking, talking - it's about attitude."

So what attitude is it that people aspire to today?

"A cool attitude, looking effortless. Not trying too hard. Looking as if you've got more important things going on in your head than just thinking about what you're wearing."

Kerrigan, the Dublin-born New York-based designer, couldn't have described herself more precisely. She wears the scuffed shoes, scrubbed…