ACROSS
1 Point to binary digits close to ten (4,2) ZERO IN
4 Sweeper covers that mostly dirty cleaning area (8)
9 Not admitted in hospital, I consumed drug for sleep (6) OPIATE
10 Lift ring to propose, courting playfully (8)
12 Pull a fast one on exposed sting (8)
13 Manager interrupts — “It's a terrible brand!” (6)
15 Story thread (4)
16 A garden set with a TV? That's unconventional (5-5)
19 Dangerous criminals — their leader's sins will involve inciting riots (10)
20 Return blows to create dispute ... (4)
23 ... and to invade war-torn country (6)
25 Divine being lured to abdicate rule, lost respect (8)
27 Grant credentials to IT cadre to code using C (8)
28 Dome built by Paul and co. (6)
29 Nation to put in order a representative system (8)
30 Take apart European immigrant (6)

DOWN
1 Friends of X scoring zeros record study (7) ZOOLOGY
2 Terrier so bubbly — he's a party animal (9) ROISTERER
3 Point, I mean, to some extent be punctual (2,4) IN TIME
5 'Yavarum ...' : primarily everyone is a kinsman (4)
6 Man quits retreat for ancestral property (8)
7 Bending when bishop leaves is due (5)
8 Businessman's money connected with father (7)
11 Lag behind while overcoming partial tax and excessive labour (7)
14 A throne remodelled as a different one (7)
17 In great delight, let out (a) purr (s) (9)
18 Timidity not just to stand on ice (4,4)
19 They're regularly getting showers in this region (7)
21 Reportedly studied video showing government formalities (3,4)
22 Light not attenuated at first when circumventing a copper cavity (6)
24 Lucky charm heading out for racecourse (5)
26 Bengali dollies circling open pool (4)