A ton of runs (7)
I believe the answer is:
century
This might be a double definition.
'a ton' is the first definition.
The definition and answer can be both quantities as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'of runs' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for century that I've seen before include "A lot of runs!" , "One hundred years" , "Group of a hundred" , "Period of time" , "lot of time" .)