Very grateful for all help with these clues please.
16ac: “Advice not to ring us,perhaps, but keep calling? (4,4,2,3,3,3).”
23ac: “Scraps with CID officers? Sit quiet, mostly (8,2).”
25ac: “At that point would thwart international movement (3,3,5).”
39ac: “Cut On Head with stick, old sailor buckled at the knee (5,6).”
50ac: “Undercover work of devious EU little concerning English (19).”