Away back in the pavilion (3)
I believe the answer is:
out
This clue might be a double definition.
'away' is the first definition.
(I know that away can be written as out)
'back in the pavilion' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
Can you help me to learn more?
(Other definitions for out that I've seen before include "Openly gay" , "excluded" , "(Of a flower) open" , "A way to escape" , "impossible" .)