1: Substantial time at your patch (5)

4: He got ripped exhibiting selfish behavior (3,4)

9: Feeling threatened, suggested concealing identity (11)

10: Anyway - no! (3)

11: A favourite car of Seattle natives. (11)

13: Picture a dessert without topping (3)

14: Avoids seeds, pits, nuts (9)

15: Englishman opening a can to dine at home (3,2)

16: Suggest I am a layer. (5)

18: Wise bird is after Sunday clothes for part of a service (5,4)

21: 4-down Arias hit high note in some of the lungs (3,3)

22: Watering devices found in run-down orange sheds (6, 5)

23: Mink, for one, may fly when theres trouble (3)

24: 27-across about starting off 1-down world unconditionally (2,3,2,4)

26: Gave up and produced (7)

27: I have a head nurse turning up birthmarks (5)

2: Piece of tile in a solid floor (7)

3: Root for mounting might (3)

4: Having red nose, turned back (7)

5: Gets in boats at sea (7)

6: Redesigned color name tag (5)

7: Confine Grandma for a time to make flag (7)

8: Grave study: code-breaking? (13)

9: Bug found in examination and in a full going-over (10,3)

12: Gloomy semi-dull firmament (5)

15: Heartbreak land (5)

17: Depict harbor town fish (7)

18: Leisure centre 6-down, storing one like bricks (7)

19: Speculated that it was a talkative visitor (7)

20: Sob wildly and preserve secret (7)

22: Sister leaves, seeing torment of supernatural servant (5)

25: Managed in lower Antwerp (3)