It holds up speakers, etc., in the hall (4)
I believe the answer is:
dais
'the hall' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'it holds up speakers etc' is the wordplay.
I cannot quite see how this works, but
'up' could be 'is' (I've seen this in other clues) and 'is' is found in the answer.
The remaining letters 'da' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'in' is the link.
Can you help me to learn more?
(Other definitions for dais that I've seen before include "Platform; podium" , "stands on this?" , "Throne platform" , "Speaker's raised platform" , "stage" .)