Having trouble with the exact parsing of these, help appreciated....
27a Coarse person rounds on affected upper-class sort (5) - YAHOO (Upper-class sort)
57a One welcoming mourner at Highland funeral? (7) - GREETER (One welcoming)
4d Campanologist who winces in embarrassment, missing first note (6) - RINGER (Campanologist)
28d Spout for a teapot, part broken off (5) - ORATE (Spout)