Cryptic crossword No 3,705

Across

1. Data from inferno claiming German university (6)
2. Unfit cops, American and unproductive (8)
3. Broadcast with work helicopter? (8)
4. The old partnership Spooner is over (6)
5. One against fee for cab (4)
6. Ship in rock stripped of diamonds for Mark (10)
7. Ancient heir sorted out bequest (11)
8. Country club with rustic walls left ugly (10)
9. A little family of accepted daughter (4,2)
10. Drew boxed check at the margins! (6)
11. Husband chowed down with disgust (4)
12. At home, Virginia covers wounds (8)
13. Issues reports of bite with doctor and nurse (8)

Down

1. Occasionally shimmy idly at river's close (7)
2. Final count confusingly having a purpose (10)
3. Never ending boring yardwork initially on time (4)
4. Some family member (8)
5. Growths of mass corrupt political units (15)
6. Character having lost their senses more (6)
7. Piece together with conclusion of story untold (4)
8. The fiend in historic jailhouse (3,4)
9. Aha moment during observation (7)
10. Heavy drinkers of coolish cola cocktail (10)
11. Rotten cavity has appeal in affair (8)
12. Pay for a delivery of type of car (6)
13. Pieces of some jewellery around southern ends of Afgani tribe (7)