The Sunday Crossword No 3002, Sunday 01 Jul 2018

ACROSS
1   People go on, mostly quiet and unknown (6) OCCUPY {OCCUr}{P}{Y}
4   Unfair skill is possessed by Greek god (8) PARTISAN {P{ART}{IS}AN}
10 Not detained, turn for coast (9) FREEWHEEL {FREE}{WHEEL}
11 Cold, ill-mannered man in power (5) CLOUT {C}{LOUT}
12 Directly demolished cheat's argument following fabrications (2,3,4,5) AS THE CROW FLIES {CHEATS}*{F}{ROW}{LIES}
14 Delicate and risky, ignoring hospital (4) AIRY hAIRY
15 Crass act on ground regarded as holy (10) SACROSANCT*
18 Porcelain produced back in top year (5,5) CROWN DERBY {CROWN}{BRED<=}{Y}

By No machine-readable author provided. N@ldo assumed (based on copyright claims). - No machine-readable source provided. Own work assumed (based on copyright claims)., CC BY-SA 2.5, Link
19 Fool after end of exams becoming complacent (4) SMUG {examS}{MUG}
21 Scare superstar with worry about new spicy dish (6,3,5) CHILLI CON CARNE {CHILL}{ICON}{CAR{N}E}

By Carstor - Own work, CC BY-SA 2.5, Link
24 Novice in charge of measurement of volume (5) CUBIC {CUB}{IC}
25 Heavy garment in crate awkwardly carried by kid? (9) GREATCOAT {G{CRATE*}OAT}
26 Set off from school in time (8) DETONATE {D{ETON}ATE}
27 Not indecent, hurried in speech (6) CHASTE (~chased)

DOWN
1   Abandoned rest, unprepared (3,7) OFF BALANCE {OFF} {BALANCE}
2   A tribute for each working person adhering to routine (8,2,5) CREATURE OF HABIT*
3   Look closely, apprehending weight in alloy (6) PEWTER {PE{WT}ER}
5   Grant, humble, supporting Pacino? (5) ALLOW {AL}{LOW}
6   Indiscreet stories about court and head of state (8) TACTLESS {TA{CT}LES}{St..e}
7   Grotesque mask, one with depth, reflects deception (5,3,7) SMOKE AND MIRRORS {MASK+ONE}*{D} {MIRRORS}
8   Crazy shock coming up (4) NUTS<=
9   Moderate when in command (8) DECREASE {DECRE{AS}E}
13 Step round plant and large insect (4,6) STAG BEETLE {STAG{BEET}{L}E}

By Taken by fir0002 | flagstaffotos.com.au Canon 20D + Sigma 150mm f/2.8 + Canon MT 24-EX - Own work, GFDL 1.2, Link
16 Revolutionary, about to honour rising, started again (8) REBOOTED {R{TO+OBE<=}ED}
17 Clan again badly missing a church member (8) ANGLICAN CLANaGAIN*
20 Wreck? It may be on the rocks (6) SCOTCH [DD]
22 Bar outclassing others to some extent (5) INGOT [T]
23 Help to keep leader in contest sharp (4) ACID {A{Co...t}ID}

GRID