Cryptic crossword No 2,415

Across

1. Elk rests having chased around birds of prey (8)
2. Get apprentice onboard to add feathers to an arrow (6)
3. Rolls cylinders (5)
4. Extremely nice and insanely clever head of laboratory identifies neuron (5,4)
5. They go far beyond amendment to sex decree (9)
6. Flog captivating masculine fragrance (5)
7. Profundities ultimately bridged the gap at each weakness (6)
8. Last part of clue incorporated by dynamic setter rocks! (7)
9. Stressed about one shilling having been dropped in expansive wastelands (7)
10. Gun dog loses right to jump onto the back of the sofa   (6)
11. Throw away king from straight to be replaced by jack (5)
12. Host of itinerant reps walk in (9)
13. Former lover put glue around the seat of your stool  (9)
14. They're always up against the odds! (5)
15. Drags forced help on board ship (6)
16. Doctor pesters to get time for preliminary examinations (8)

Down

1. Army officer listened to heart (6)
2. They draw small boat with eight ropes slung in front (9)
3. Someone who admires extremely repulsive ghost shuffling feet (9)
4. Banks, for example, lean after top falls down (7)
5. Staffordshire town's Welsh emblems (5)
6. Subject of article by yours truly? (5)
7. Incapacitated, he spells badly (8)
8. Peter's supply adjusted in advance  (6)
9. Most radical term set ex off (9)
10. Standing up before court head  (9)
11. Creep joins fewer with a lack of boundaries (8)
12. Group of seven pets attacked alien (6)
13.  Producer of metal with casing of enamel in abstract terms (7)
14. Banks of clouds cover the remainder of peaks (6)
15. Go over and above plus-size, by the sound of it (5)
16. Idiot shredded towrope after wheels flew off (5)