The Sunday Crossword No 3111, Sunday 02 Aug 2020

ACROSS
1   ‘Unit of energy’? … ‘inert gas’? … technical gibberish (6) JARGON {J}{ARGON}
4   Trump's, perhaps, after getting elected: ‘Bigly!’ (2,6) IN SPADES {SPADES}<=>{IN}
9   They loathe seeing radiators losing energy (6) HATERS HeATERS
10 Perhaps pen letters in Athens describing 'the empty pasty' (4,4) MUTE SWAN {MU{ThE}S}{WAN}

12 Revolutionary in charge, suppressing Polish: sweet (8) CHERUBIC {CHE}{RUB}{IC}
13 Lager, one repeatedly called for by Brando (6) STELLA [DD]
15 Found the goat striving to run amok (3,3,2,4) GET OUT OF HAND*
18 Beast that’s not spotted in the wild, clapboard elk (5,7) BLACK LEOPARD*

21 Chorale not about to be arranged for Asian city (6) LAHORE cHORALE*
22 Italian physicist, with anger, becomes prolific essayist (8) VOLTAIRE {VOLTA}{IRE}
24 Waiting, backed up; EU repeatedly getting into N. Ireland question; good! (8) QUEUEING {NI}{EU}{EU}{Q}<={G}
25 Brief pint, drinking 'Queen & Country' (6) BELIZE {BE{LIZ}Er}

26 Yech! I’d nastily consume beasts like anteaters (8) ECHIDNAS [T]

27 What drug pusher might say at entrance: ‘Sweet dreams’ (6) IDEALS {I DEAL}{Sweet}

DOWN
1   Avant-gardist seen in can, euphemistically (prison) (4,4) JOHN CAGE {JOHN}{CAGE}
2   Perhaps gîtes in the Dordogne to be overrun with vermin (8) RETREATS {R{ETRE}ATS}
3   Novel, one that's familiar to you and Everyman (3,6,6) OUR MUTUAL FRIEND [DD]
5   Not a single American displays common sense (4) NOUS {NO}{US}
6   Blasted horns, portent before goal for team (7,5,3) PRESTON NORTH END {HORNS+PORTENT}*{END}
7   Primarily, delay a while, delay, loiter endlessly? (6) DAWDLE Acrostic &lit
8   Arrangement with cheap horn for Spooner (6) SYNTAX (~ tin sax)
11 Desired broccoli, essentially producing wind (7) SIROCCO {deSIRed}{brOCCOli}
14 Most ayatollahs brought up a vegetable (7) SHALLOT ayaTOLLAHS<=
16 Largely unadorned little Italian church? Actually, for starters, it's anything but! (8) BASILICA {BASIc}{Li...e}{It...n}{Ch...h}{Ac...y} Semi&lit
17 Head after comic figure, sloth (8) IDLENESS {NESS}<=>{IDLE}
19 It commemorates an unpleasant mixture of bacteria and saliva (6) PLAQUE [DD]
20 Beat with run in the silence (6) THRESH {TH{R}E}{SH}
23 Ancient empire where bionic man oddly not seen (4) INCA {bIoNiC+mAn}

Reference List
Unit of energy = J(Joule), Energy = E, About = C, Question = Q, Good = G, To be in French = ETRE, Run = R