The unclued lights are of a kind.
 

Across

 
1    Remains close to the co-founder of the Townswomen’s Guilds (5)
10    Willing to help prepare musical backing (11, hyphened)
15    Girl in a race to immerse boy with fragrant oil right away (8)
18    Wrung a confession out of us subjectively instead, maybe (7)
20    Snake wriggling in net on part of rigging (7)
23    City General — deserted on the Sabbath (5)
24    Sweet rice wine reduced — it goes round palm (6)
25    Wavering magistrate has no charge for disgrace (6)
28    Heard to have made one’s way to the...