1a: All a person could get from power supplier. 5/5 letters. s???r and ?a?e? 8a: Dry in South London. 3 letters. s?? 13a: Pressing fellow from Chaldean city. 6 letters. ??????
Parsing pls for... 15D In which tourists may have been for a ride = rickshaw, presumably. 23D Copper missing poison that's hard to find = rare, presumably.
13d Retire to chew the cud when enrolled (9) ????????D 17d Seeds to unlock the grate? (3,4)i ??? , ???S 10d Frequency adds weight to the bike (9) ?i??????? 14a Toxic evergreenthat leader has no sort of... ...