Cryptic crossword No 3,283

Across

1. Comes out with topless lunatics (6)
2. Songbird and bear concealing passion (8)
3. Architect's autograph acquired by Bambi, perhaps? (8)
4. Putting everything in order so Alpine habitat can grow wild (15)
5. Game reserve's same old tactics (8)
6. Logical to retreat close to extremely hungry carnivores (6)
7. Reported how managed returns damaged trade (8)
8. Primarily quartz, uranium, arsenic and argon identifiable in bright celestial body (6)
9. Enthusiasm for her lead-free kitchen utensil (6)
10. Scoundrels start to kneel at the front of church aisles (6)
11. Obsession with internet supply going backwards initially introduced by egghead (4,4)
12. Source of river is giving itself new openings (6)
13. State secret extract from protocol or a doctrine (8)

Down

1. Opposed to manuscript covering insect (6)
2. Writer's ego spoiled article (6)
3. Bringing up endless dried fruit (6)
4. Planning for the future meeting of footballer with fine monarch (7,8)
5. Property owner left with loud praise (8)
6. Graduates quickly starting to seize woodwind instruments (8)
7. Leaders to venture out yearly and glamorise European travel (6)
8. Saw through former partner's surprise attack on the radio (6)
9. His low-key wife walks out in disarray like a country bumpkin (8)
10. Crushes dates (8)
11. German agreement gets Himalayan nation coming back with love for chilli pepper (8)
12. Crisp light fabrics with Welsh flower and French amaryllis borders (8)
13. Urge other members to accept unknown quantity (6)