5  Dead signal filed in binders (7)

10 Head to tip after finish what's on the menu (4)

11 Process of making operative turn on CIA via double-cross (10)

12 In UCL, Einstein discovered the centres of atoms (6)

13 Loved confused elderly person, ordering therapeutic drug (8)

14 Massage oils I got after book by life expert (9)

16 Post unknown research (5)

17 British officer commanding a region involved in making speech (5)

19 Vague, confusing noise has no measurable extent (9)

23 Starts to glitter like gold, and blackout with inability to see properly (8)

24 Boozy, go tenderly holding fertilised egg (6)

26 Mark clue wrong over opponent's little brain, perhaps? (10)

27 There's a hundred and one places (4)

28 Refuse to gather rest of body (7)

29 King's off the hook after sailor finds a small bone (7)

 2  Impulses to break universal limits (7)

 3  Cell contents are cell walls containing your total organism's origins (5)

 4  Taking pictures of parts of Jemima, gingerly (7)

 6  Batting 5 and 4, with nothing in real life (2,4)

 7  Stationed by working remedies (9)

 8  Medic, taking performance-enhancing drug after operation, fell down (7)

 9  Cystitis with long-suffering friend, how to write about it? (13)

15 Hannibal's capturing ancient city, for readers, perhaps (9)

18 Recall embracing Elizabeth for comfort (7)

20 Catalysts misleading enemy around bend to the south (7)

21 Topical treatment relating to sight (7)

22 Small animal sat on empty nest (6)

25 Apparatus built by work left by soldier (5)