28a. MALT WHISKY, drink. (ALT, key + WHISK, mixer) all in MY!, I'm amazed.
5d. I'm not quite sure about this one, it could be
UNHORSE, throw. j(UN)k, junk removed from tips? + HORSE, a slang word for heroine, or junk.
1d FOAM AT THE MOUTH, flip. MATTHE(w), gospeller almost, in FOAM, sea, + OUT, public + H for hotel.
22a. OVERISSUE, Note glut, as in too many banknotes, OVER, concerning + ISSUE, children