1a. Plant in the womans pub is hiding piano (4,5) h-p- p-l-s 18a. A bloke crossing a river in a ship(6) a-o-r-
Times 24,239 11a. First in sports to break united resistance(6) o---e- 6d. Mount etna exploded with energy for universal satisfaction (9) a-e---e-- Thanks in advance
11a opener (first in)...sports = P.E. inside one (united) + R (resistance)
6d atonement - anagram of Mo(u)nt Etna + E (energy instead of the "u" (universal)