In which to possibly score about a hundred? (6)
I believe the answer is:
soccer
'in which' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'possibly score about a hundred?' is the wordplay.
'possibly' indicates anagramming the letters.
'about' is an insertion indicator.
'a hundred?' becomes 'c' (Roman numeral).
'score' anagrammed gives 'socer'.
'socer' enclosing 'c' is 'SOCCER'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for soccer that I've seen before include "Ball game" , "Roy Keane's game" , "Association football" , "Informally, game" , "popular game" .)