Oops! Our replies crossed jazzgirl!
31D sensible; course of action (7) A?V?S?D
I've got all the letters for 4D exchange greetings (4,3,4,2,3) & for 24D A frank & outspoken reprimand (1,5,2,4,4) but I just can't see the phrases so am probably more blotto than usual today!