German city‘s Irish quarter (7) = MUNSTER
Double definition. There are four Irish Provinces (Connacht, Leinster, Munster and Ulster) but they are also known as fifths – Meath was subsumed into Ulster and Leinster.
Brake hard, going into something motorist tries to avoid (7) = THICKET
something motorist tries to avoid = TICKET, hard = H
BRAKE = thicket