Margaret hasn't finished taking a stand? (4)
I believe the answer is:
dais
'a stand?' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for dais that I've seen before include "support for speaker" , "Low platform at end of hall" , "Raised floor" , "stage" , "Platform; podium" .)