25 across Mistresses take action to hold back desire (8) S???N?Y?
19 down Oddly framed, Rhine's creature of myth (6)?A?R??
11 across Church Bar opening to cause disgust (3) I?K Irk? why?
26a stepneys
19d an awkward one; best guess is "faerie" as no anagram of "framed" fits but an angram of "Freia" + an "e" fits as Rhine's creature - see Wagner's Ring cycle - and answer is a mythical being.. if that makes sense!
11a Kirk=church; "bar opening"=remove 1st letter.