SAGA April

[DSJ]

13a Swelling with blood all round (6) ?O?T?E I think this may be AORTAE but am not sure 7 can't work out why.

20a Interferometer and other things in operation (6) E?A?O?

24a Turning up, still without energy - in consequence, yawns. (9) ???I???E?

Any suggestions much appreciated.

[Mamyalynne]

13 GOitRE

[DSJ]

Thank you.

[mazie]

20a Etalon

[Mamyalynne]

24 Oscitates means yawns, cannot see the wordplay though.

[DSJ]

Thank you both. No, I can't see how the compiler worked out the clue for 24a. Can anyone else?

[Oldred]

s(e)tatic + so reversed

[a.trembath]

static reversed as part of word - e= energy

[DSJ]

Yes, I see now. Many thanks.