6  Purist coming to grips with new jewellery (7)

 7  Vegetable patch I venture inside (5)

 9  Stare through fog, retreating one step at first (4)

10 Unseal the envelope, finding something anyone can read (4,6)

11 Boneless, dissipated French aristocracy (8)

13 Assistant's responsibility to include exercise reversed (6)

15 Had an obligation, given ring, to get married (4)

17 Badger I see returning -- and in Germany! (5)

18 Regularly forgetting Tehran is Asian (4)

19 Slacker's no-hoper with nothing invested (6)

20 Where to try exercising raw clout (3,5)

23 Had coronet fashioned into symmetrical shape (10)

26 Recalled man in India, not husband, as preference (4)

27 Sound of predator in northern forest (5)

28 What a pity to return and almost fail to notice island (7)

 2  Former PM underwritten by small golf tournaments (6)

 3  Eyesore where a pig lives, they say (4)

 4  Unusually clouded over? Cold front? (8)

 5  Understate newspaper's fault (4)

 6  Instrument of torture I promoted gets old (5)

 8  Chosen artist for princess (7)

12 Horrible miser leaves Square Mile, excited to become a peer (5)

14 Deadly projectile is a bird, reportedly a turkey (6,4)

16 Court Democrat to censor work of art (7)

17 Someone riding a centaur? (8)

21 Extract victory over king the Spanish set up (6)

22 Takes care of readers retiring editor overlooked (5)

24 Mathematically, a line is area times one point (4)

25 Stood up, presenting a flower (4)