9  Mostly happy about source of uncertainty detectives clear up (9)

10 Apple publication possibly gets round final stage of development (5)

11 Perhaps Bernstein has time to replace new garment (7)

12 Bad actor tours Delaware in style (3,4)

13 Camouflaged shelter from which I depart (4)

14 Fired Eastern doctor of former Times editor (10)

15 Reason to assume the Queen's very uneasy (7)

17 Criminal is full, having eaten a bit of Italian's pasta (7)

19 Worrisome and annoying having leader beset by us (10)

22 One has to avoid hassle finding key (4)

23 At mass gathering that man is in disbelief (7)

24 Help put on a change of clothes? (7)

26 Greek enchantress left out of group (5)

27 Symbol of exchange with old currency (9)

 2  Smaller group from America heading north over frontier (8)

 3  Lives in Pennsylvania, in city with listed building (4)

 4  Problem raised after fellow US lawyer gives court order (8)

 5  Flowing on and on endlessly (6)

 6  Dangers at beach resort priest ignored on vacation (3,5)

 7  Collapse from cold on a vessel (4,2)

 8  Nostalgic sentiment of lord intoxicated by drink (3,3,5,4)

16 Rogue is rude to stranger (8)

17 Gloomy fellow invented cloaking device at last (8)

18 Upright wise man, extremely vocal, admits it is better to go here? (3,5)

20 Special exercise keeps her in shape (6)

21 Way I take advantage of briefly lifted restrictions (6)

25 Performance is outstanding, and that's final! (4)