TIA for help.
24A It's plain where Brazilians from the south go to Mass or, if misguided, to farm. (4,6)
_ A _ _/_ R _ _ _ O
27A I'm on first name terms with The Big O, friend, so treat him with the full red carpet VIP package. (7)
R _ _ _ L _ _ Maybe REGALLY but don't get Big O ref.
17A When person of rank evicts one from rented accommodation, there's little left in place of it. (4)
_ I _ _
19D It's in a dry state, like 3S0. (7)
T _ I _ _ _ _
(The last letter of 27A and 19D is the same letter).