Operating theatre's closing for benefit of patients? (8)
I believe the answer is:
ligature
'operating theatre's' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for ligature that I've seen before include "Cord for tying blood-vessels" , "Musical slur" , "Thread used in surgery to stop internal bleeding" , "Binding used for strangulation" , "Cord used to tie off in surgery" .)