11d- buzzers used in sex education part II (4) - ?E?S
1ac- lock in shed if leaving hotel under pressure (8) - S?R?S?E? - stressed = under pressure, but can't parse rest of clue.
19ac- return of slayer of beasts (7) - A?I?A?S - animals, but how does slayer parse?
Help appreciated, with explanations
TIA
HH