HOLIDAY COLLECTION CROSSWORD NO 92 GIANT CRYPTIC

I NEED HELP WITH
19A WHERE TO LEARN REFINEMENT C?A?E
18D THEY MAINTAIN THE BEAT UNTIL THERES AN ARREST H?A???
8D ASK PIERS ABOUT COCKTAIL HOUR IN CHALET A?R?E?K?
26A ASSIGNED POST IN BROADCASTING BUILDING ???T?O?
34A PKER STATES KEPT IN JAM JAR ?O?
50D STANDARD HEADLINE ?A???R
51A OLD SALT ANCIENT ACCORDING TO COLERIDGE
56D VEIW PRAIRIE THEY SAY FROM AMPHIBIOUS AIRCRAFT ?E???E?E
57D SIGN OF AGE WHICH IRON WILL HELP ELIMINATE ???N?L?
61A FLOOD IS WRITTEN RIGHT IN THE MIDDLE OF LANDLORDS SIGN
?O?????
65A IN PURE GLEE START TO CARRY OUT A CLEANSING ??R?E

THANKS MAIZIE