6a. Second home in country landing tax once
SCOT
16d. Person of honour dined with Lee - not I
LAUREATE
(I get the parse IF we're talking about Laurie Lee of Cider with Rosie fame, not General Lee ...although why either of these people is used in cryptics, I'm not sure).
1a. Wobbly teeth about to rot could be thus described?
PRECARIOUS
17a. Bird close to warming duck's back
NIGHTHAWK
Parses for the above please.