1: Plastic shelf for meat (5)
2: Ground dipped around bottom of ditch (7)
3: Polish hollow late Russian coin (5)
4: Auction to stem persuasive patter (5,4)
5: Bird seems unsure before small travelling salesmen (7)
6: Valuable discovery certain in luxury travel (8,5)
7: Be quick to make appearance with instrument (4,5)
8: Little weight spoils head honcho in sophisticated secondary institute (7,6)
11: Love to influence the polar type. (9)
12: Frank comes to fall practice a lot (9)
15: Schoolchildren made to come back on Saturday make mistakes (4-3)
16: The ex-President's back; time to withdraw? (7)
18: Quick beer, right? (5)
19: Skied around protective barriers (5)