Big score in club tourney Ed put together (6,7)
I believe the answer is:
double century
'big score' is the definition.
I know nothing about this answer so I can't judge whether this works.
'club tourney ed put together' is the wordplay.
'put together' is an anagram indicator (put the letter together correctly).
'club'+'tourney'+'ed'='clubtourneyed'
'clubtourneyed' anagrammed gives 'DOUBLE CENTURY'.
'in' acts as a link.
Can you help me to learn more?
(Another definition for double century that I've seen is " Score of ten score?".)