Thanks Roof, I'm glad you enjoyed your walk. I used to go out with a girl who was a fan of the Archers so I'd listen to it from time to time - I really like Lynda Snell;-)
57a - 5 letter "shifts" as in 'we'll take it in shifts' or 'we'll take it in ?????' goes around usual 2 letters for "each" - definition is "we serve drinks" but it's a bit misleading because it's an inanimate object rather that a person.
9d - 3 letter "prince" (shortened nickname of a Shakespeare prince) then 5 letter "outlaw" reversed/'backed' then 2 letter "lines" (think trains) - yes, it is a specific (American) "actress"
37d - 2 letter "sailor" + 4 letter "another (sailor)" minus first letter/'with no Joint' - definition is "surprised"