I found this puzzle on the easy side. Solving time: 14 mins
Will concentrate on a small number of what seemed to me the trickier clues, but happy to explain others if asked.
* = anagram
ACROSS
11 ABOUT TIME t = time so if Mae is about time you get mate = partner.
17 LEFT-HAND DRIVE Dr (doctor) in (the field + van)*
25 L EDGE R & lit.
26 ED DIED
DOWN
3 TURNED OFF off is turned (i.e reversed) in effort
4 DEAN AND CHAPTER The authorities of a cathedral (cathedra + panned)*
19 OR DEAL OR = Other ranks (soldiers) Definition: hell on earth – took a little while to convince me as ordeal but I guess it’s OK.