11a. Drop a ball on golf-course, as before (5) G-T--.
16a. No longer proud and superior, in inferior situation (5) -AULT.
17a. Fish served in mansion leading to fuss (8, two words) SEA---U-.
3d. Mind the dog maybe-small son getting bitten (6) PE-S--.
4d. Public property Earl initially sealed off (5) ST-T-.
12d. Cleric, one attached to Durham say, demonstrates quality of biblical books (10) CA--N-E-TE.