Very grateful for all help with these clues please.
6dn: “Road turned north past a delta- and so did railroad (9).”
7dn: “A natural habitat, maybe, different from new zoo, etc (7,4).”
17ac: “Carries out hit-and-run attack: the main details (4,3,5).”
26ac: “Knocking shop people ultimately thought to stop visiting repeatedly (3-1-3-3).”