4D In Australia and New Zealand, Dog that herds Cattle by biting at the back of their feet 6 LETTERS H?E??R
5D A Person, organization etc. regarded as being the leader in a particular field of activity.
10 LETTERS P?C?SET?ER
6D A Palm Tree of the East Indies, with large Leaves that are used for thatching 7 LETTERS T?L?P?T