3 to finish, bitte 10a worker leaving officer some twilled fabric - serge? why? s-r-- 18a unavoidably involve fifthrate latin translation e-t-a- 8d parachutist who is shouldn't feel it5 s 4 ----d- to d-o-
10a Take "ant" (worker) out of "sergeant" (officer) leaves serge = twilled fabric
18a entail - anagram of "latin" and "e" (fifth letter of alphabet)
8d Ready to drop