Not much room for experiment? (3)
I believe the answer is:
lab
This might be a double definition.
'not much room' is the first definition.
'lab' can be an answer for 'room'. I'm not certain of the 'not much' bit.
'experiment?' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'for' is the link.
Can you help me to learn more?
(Other definitions for lab that I've seen before include "Workplace for scientific research, in short" , "retriever" , "Science room" , "Dog" , "Place for experiments" .)