Spell in which nobody gets the runs (6,4)
I believe the answer is:
maiden over
'spell in which nobody gets the runs' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for maiden over that I've seen before include "activity on field at no cost" , "tight spell of bowling" , "Six balls with no runs" .)