Good puzzle, as always from Dac. This one I found on the easy side esp bottom half of grid. Solving time, 12 mins.
* = anagram < = reversed
ACROSS
1 POS(t)ERS Excellent surface reading
4 CH (IN) A SE A rush = chase
10 STE(E)P Definition very straightforward. Edge could be either end of precipice so I’d some doubts at first before crossing letters confirmed.
11 EUROT RASH (route)* spots = rash New word for me that I worked out from the wordplay when I’d some crossing letters. Disparaging US reference to rich Europeans apparently.
12 ITEMISE Hidden document (vb) here so clue misled nicely
13 DURABLE (a builder)* less i Well-concealed anagram
15 TOAD-IN-THE-HOLE (Heat oil then do)* My first answer and one of my favourite dishes, maybe seen less often today.
18 TOP OF THE WORLD Carpenters hit from 1973 – fairly easy from the enumeration and wordplay
22 IN (DIA) N A aid< inn = local a = area
24 HAD R(I)AN Topical
25 PRACTICAL Double definition – very easy clue
27 ORDER Double definition
28 RAP A CITY
29 PLEDGE Double definition
DOWN
1 PA SSIM (miss)< Excellent surface
2 STEREOTYPED (seedy Potter)* Amusing surface, bringing Dennis to mind
3 REP L ICA Clue splits seamlessly at model/theatre
5 HE ROD
6 NITERIE (in Tiree)*
7 SPA Hidden reversal
8 A (CHIEf) VER Aver = state Can’t ever recall seeing or hearing it other than in a puzzle.
9 F (EVER) ISH School = collective name for fish
14 BROAD MINDED
16 T (OWN H) ALL Definition = municipal building H = horse (heroin) have = own tall = big
17 S (start of show) TRIPPER
19 FR ANTIC(s)
20 RED POLL
21 EN TREE Seasoned solvers will think quickly enough of ‘tree’ for plane, perhaps. en = in (French). Good surface reading
23 AS C OT Not quite sure of the wordplay here, but have verified my answer. I think it’s as = like and (to c)< with c for cycle. It’s not however given in any of my dicts to hand as an abbreviation so I may be on the wrong track “Like to cycle around town”
26 (w)ASP
23d Collins gives ‘c’ as an abbreviation for ‘cycle’ so I think you are right.
Re c – cycle: As in so many rpc – revolutions per cycle? Not quite sure.
Rishi
As in cps (cycles per second) the predecessor of Hz as the unit of measurement for frequency.
Looking again at my Collins (2003), I missed the c = cycle, abbreviation 3.