Solution to 18D has been deliberately left unsolved and is to be answered only by a non-regular / novice commenter, with proper annotation. Those who have answered earlier in the week, please give others a chance.
Open for anyone to answer, if not solved by 1 PM.
ACROSS
6 Move forward suddenly with energy after a breather (5) LUNGE {E}<=>{LUNG}
7 Drunk giant beating one in a suit (8) LITIGANT {LIT}{GIANT*}
10 Sweet simpleton about to lose (7) GUMDROP {MUG<=}{DROP}
12 Salad vegetable you eat finally instead of essentially sweet items seen often on the table (7) CUTLERY C(-e+u+t)UTLERY
13 Figure study about past is boring (7) DECAGON {DE{C}{AGO}N}
19 Open dancing club on Western border of Kentucky (7) UNBLOCK {CLUB+ON}*{Ke...y}
21 Starmer finally dismissed in England - not unexpected (7) ROUTINE {s...eR}{OUT}{IN}{E}
23 Fancy cloak worn by wealthy mostly (7) CAPRICE {CAP{RICh}E}
25 Poor cautious husband overcome by panic in the middle (7) NEEDFUL (-h+n)NEEDFUL
26 Not worried about a judge concealing source of earnings? (8) CAREFREE {CA}{REFeREE}
27 Firm promoted clothing - Indo-Western primarily (5) SOLID {SOL{In...n}D}
DOWN
1 Energetic Team India playing without inhibition from the beginning (8) ANIMATED {TEAM+iNDIA}*
2 Rule about replacing girl in class (6) DECREE DE(-g+c)CREE
3 Kid's storage device? (6,4) FLOPPY DISK {KIDS}* [RA] To think that present day kids have never seen one of these. I stuck 5 of them together and made a Pen stand!!
5 Do this when fully charged? (6) UNPLUG [CD]
6 On a vacant country estate (6) LEGACY {LEG}{A}{Co...rY}
13 Look-alike of late Queen outside club (4,6) DEAD RINGER {DEAD}{ER} over {RING}
15 Word for one, included in MS Office finally (7) PROMISE {PRO}{M{1}S}{o...cE}
16 Trouble with data after new digital enhancement tool (4,4) NAIL FILE {AIL}{FILE}<=>{N}
18 Norwegian perhaps went ahead and settled (6) ?E?L?D (Addendum - SEALED {SEA}{LED} - See comments))
20 Lesser action near entrance of popular place (2-4) BY-PLAY {BY}{Po...r}{LAY}
22 Apprehension about Europeans losing exports essentially (6) UNEASE EUropEANS*
24 Uncovered vehicle carrying dead body and organs (4) EARS hEARSe
Reference List
Energy = E, Drunk = LIT, About = C, England = E, Husband = H, , About = CA, Girl = G, Good = G, Hot = H, Indian = I, Money = M, Queen = ER, New = N, Left = L