Political choice possibly testing chamber? (10)
I believe the answer is:
laboratory
This clue could be a double definition.
'political choice' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'testing chamber?' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'possibly' is the link.
Can you help me to learn more?
(Other definitions for laboratory that I've seen before include "Place of scientific research" , "Place for experimentation" , "Language-learning facility" , "Where researchers work" , "Where litmus paper could be" .)