Hi ixion
Agree with your answers.
7d A brownie is a type of cake - 'square of rich cake with nuts' according to COED, originally from USA but I've seen them in coffee shops in UK.
B - Bishop; RE - note; OWNI - to have one.
16d Am also puzzled by this, ANT = worker obviously but Everyman seems to equate SAFE with excellent which I find odd.
Can you explain 22ac? Got answer from crossing letters and 'bellringer' but why Low Sunday?