"Do you have traditional clothing?"
Translation:An bhfuil éadaí traidisiúnta agat?
An bhfuil is used when a question is being asked without a relative clause; atá is used within a relative clause (not necessarily with a question).
For atá, here’s Article 12, §3, 2° of the Irish constitution:
Duine atá nó a bhí ina Uachtarán, is intofa chun na hoifige sin é aon uair amháin eile, ach sin a mbeidh.
A person who holds, or who has held, office as President, shall be eligible for re-election to that office once, but only once.
This exercise’s translation above demonstrates an bhfuil.