"Club competition" refers to a competition or tournament solely among members of a club or organization, where individuals or teams compete against each other to determine a winner within the group. Full definition
It's the biggest club competition in football and to put out backup players like that is a joke. (justarsenal.com)
The Dutch league is now 12th in the continental rankings so they would no longer get sure slots in the elite club competition. (netherlandsfootballfans.info)
And having a European club competition, a trophy in the cabinet, is better than having nothing. (justarsenal.com)