No 12734, Thursday 19 Sep 2019, Arden

ACROSS
1   Consider vacating residence and pull over (6) REGARD {Re...cE}{DRAG<=}
4   Complete work, current is constant but creates adverse reaction (8) ALLERGIC {ALL}{ERG}{I}{C}
10 Hide under stone? He's mean (9) SKINFLINT {SKIN}{FLINT}  'Under'?
11 Street urchin mostly gambling (5) GAMIN GAMINg
12 Wine in the making, one gallon for a horse (7) MUSTANG {MUST}{AN}{G}
13 Stylish and neat, tailored clothing for cricket side (7) ELEGANT {NEAT}* over {LEG}
14 Material or any substitute (5) RAYON*

15 Tales of a disaster in the recent past (2,2,4)  AS OF LATE*
18 Fear grips the party, it's widespread (8) PANDEMIC {PAN{DEM}IC}
20 They're brilliant – green, vivid, seen regularly... (5) GENII {GrEeN}{vIvId}
23 ...but it's fortified (7) REDOUBT [CD] (addendum - {BUT}* [RA] - See comments)
25 It stops, follow in a series (2,5) EN SUITE {ENSU{IT}E}
26 Vessel takes four in turn (5) PIVOT {P{IV}OT}
27 Deception is in – even beer comes in any container (9) CHICANERY {CHIC}{AN{bEeR}Y}
28 Left on board, in no time can be carried (8) PORTABLE {PORT}{tABLE}
29 Let down, bet one ends in loss (6) RENTED {REN{beT}{onE}D} (Addendum - {RE{dowN}{beT}{onE}D}

DOWN
1   Railroad added to a tourist spot in South Dakota (8) RUSHMORE {RUSH}{MORE}

2   Dispute profits over a year (7) GAINSAY {GAINS}{A}{Y}
3   Avoided if rear end is shifted (9) REFRAINED*
5   Landlord forced out, it is a commercial document (6,2,6) LETTER OF CREDIT {LETTER}{FORCED*}{IT}
6   Finally the tailender comes in time to score (5) EAGLE {thE}{AG{taiL}E}
7   Athlete gets indirect tax cover for many sports (7) GYMNAST {MANY}* in {GST}
8   Nice to see one accepted as King (6) CANUTE {C{AN}UTE}
9   Indian way to help lift it – a calm representation using drawings (14) DIAGRAMMATICAL {MARG}{AID}<={IT+A+CALM}*
16 It's on but delayed to do parliamentary work (9) LEGISLATE {LEG IS}{LATE}
17 Fish eye in two dimensions, surprised? (4-4) WIDE-EYED {IDE}{EYE} in {W}{D}
19 Hampshire town, a new port (7) ANDOVER {A}{N}{DOVER}
21 Most trusting, natives are free (7) NAIVEST*
22 Support for a pet (4,2) PROP UP {PRO}{PUP}
24 'Extremist' – insult rankles somewhat (5) ULTRA [T]

Reference List
Current = I, Constant = C, One = AN, Gallon = G, Cricket side = ON = LEG, Time = T, Year = Y, One = AN, Dimensions = W(width), D(depth), New = N

GRID