2d athousand in african country abandoning river on the rise,departed 2 4 11a bills encapsulated by combination of corn and bean stew 10 c- - - - -e-d- 28a mundne letters from listener retired sent back 7 t-r-e-e
2d No more (departed) = Cameroon (African country) "abandoning" CAM (river) = eroon + M (one thousand) = eromon, and then backwards = no more
11a Carbonnade (stew) = AD (bill) inside an anagram of "Corn + Bean"
28a Terrene (mundane) = hidden backwards in clue List(ENER RET)ired