6a. Vessel of less tonnage, perhaps (7) ???H???
10a. Awfully nice tip in beginning (9) ?????I?N?
1d. A number do so to the garden (5) ???I? (Second letter of this is second letter of 6a).
3d. Eager to be sharp (4) (2nd letter is 6th letter of 6a).
8d. Not a thrashing to be open about (6) ???I?? (2nd letter is 4th letter of 10a).