No 13052, Monday 28 Sep 2020, Arden

Solution to 1D 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.

ACROSS
9   Classy headgear, an ideal (7) UTOPIAN {U}{TOPI}{AN}
10 The loan goes for fuel (7) ETHANOL*
11 Moorland once a part of Florida (7) ORLANDO [T]
12 Old patriarch provides a support for an actor (7) ABRAHAM {A}{BRA}{HAM}
13 Parsee not used to this language (9) ESPERANTO*
15 Dodge pickup — indeed a very good vehicle (5) EVADE [T<=]
16 Mornings, regular haulage comes inside compound (7) AMALGAM {AM}{hAuLaGe}{AM}
19 Short course at following petition (7) ENTREAT {ENTREe}{AT}
20 Starts taking hold, strange way to play music (5) THRUM {Ta...g}{Hold}{RUM}
21 Sporting giant — taking care, serving (9) ATTENDING {AT{TEND}ING*}
25 Nothing left, one felt inadequate with Patty (7) FALAFEL {FA}{L}{A}{FELt}

26 Country close to turmoil, free those only (7) LESOTHO {t...iL}{THOSE*}{O}

28 The Spanish bar John Turner, perhaps (7) CANTINA {CAN}{TINA}
29 Bone sets, closes around hip at the centre (7) OSSICLE {OSS{hIp}CLE*}

DOWN
1   Storm warning over old city (6) ?U?O?E (Addendum - FURORE {F{UR}ORE} - See comments))
2   Helping party election, heading north (6) DOLLOP {DO}{POLL<=}
3   Air current passes through workers (4) MIEN {M{I}EN}
4   Old judge — part of nine to uphold and issue a ban (6) ENJOIN {NI{O}{J}NE}<=
5   Deadly but not hard, one is much less (3,5) LET ALONE {LEThAL}{ONE}
6   Let anchors drift in port (10) CHARLESTON*
7   Turn each into something formless (8) INCHOATE*
8   Fruit fly perhaps is largest in size (8) PLUMPEST {PLUM}{PEST}
14 Politician briefly on a roll — representing a street urchin (10) RAGAMUFFIN {RAGA}{MUFFIN}
16 Ex US President exposed, truth will be of interest to historians (8)  ARTEFACT {cARTEr}{FACT}  
17 Plain art could be evergreen (3,5) AIR PLANT*

18 Afloat at sea, I’m on top with something to eat (4,4) MEAT LOAF {AFLOAT}*<=>{ME}

22 Pull everything in, it’s greasy (6) TALLOW {T{ALL}OW}
23 Fellow becomes tense in the middle, actually it’s complete (6) INTACT IN(-f+t)TACT
24 Scowl as David, say, gets a fifty (6) GLOWER {G{L}OWER}
27 Band provides hard support for special forces (4) SASH {H}<=>{SAS}

Reference List

Classy = U, Nothing = FA(Fanny Adams), Left = L, Only = O, John = CAN, Party = DO, Current = I, Old = O, Judge = J, Hard = H, Fellow = F, Tense = T, Fifty = L