As well as `hypothetical particle (see my previous query) I am puzzled by 13D I have it all except the second word ; As ...? ? ? S ...as... . A word meaning `different `. Mags.
Chambers Dictionary gives RISHI as a sage or poet (Sanskrit).
I expected 7D to be SWAMI but this will not fit with SUPERPOSE as the answer for 5A Place above something else (9).