Across
1 Warning from revolutionary work in middle of argument(3-3)
4 What about politician with a muscular movement being decisive? (8)
10 Time after time entering bar and beginning to yell angrily (7)
11 Begin to deal with commercial outfit (7)
12 Peevish, right away, making tiny sum of money (3)
13 Dry joke initially in exclusive story left by popular composer (5,6)
14 Small item of kit assembled, including a prong and energy socket (7,6)
17 Shiny material in heap later shifted outside shelter (6,7)
21 Protective curtain, very large, left in artist’s possession (8,3)
23 Business with black swan (3)
24 Note less than clean (7)
25 Piece of mosaic put back before start of study period (7)
26 Basic structure half of sketch revealed (8)
27 Loose-fitting garment working, I see, in a different way (6)
Down
1 Abnormal rise in volume that’s annoying (8)
2 Offend astute pro improperly forced into retirement (3,3,2,7)
3 Is child following father? That must be a thrill (7)
5 Indicated nitrogen in substance (5)
6 Fish received on wharf (7)
7 Struggling to help sect, think things are getting complicated (3,4,8)
8 Nothing wrong in church function (6)
9 Colour around unknown part of Alpine region (8)
15 Glen that gets spoilt eventually (2,6)
16 Game in enclosure disrupted by band? Not on (8)
18 New deal excluding filling in actual roll (7)
19 Skilled worker, prejudiced, quietly dismissed (7)
20 One in climbing small trees showing signs of happiness (6)
22 Trunk carried by visitor sometimes (5)