Very grateful for all help with these clues please.
1dn: “Mends fencing in king’s colours (5).”
14ac: “Explosive start setting one back a bit (5).”
42dn: “Wife, under arrest in Grammar School, with a sharp object (6,3).”
43dn: “A viewer of EastEnders Christmas special? (5,3).”
54ac: “Triumphant cry on clinching record, that’s followed by “Bravo” (5).”