The phrase "others clubs" refers to clubs or groups that do not include oneself. It implies that there are different clubs or groups that other people belong to, but you are not a part of them. Full definition
For a manager who has branded the spending of other clubs in the current market «scary» it represents a major commitment, and will not be one he takes lightly. (standard.co.uk)
How many of those players you mentioned have attracted bids from other clubs for as many as two or three seasons running?? (justarsenal.com)
He revealed that the club's officials ensured they felt loved by the club despite being away at other clubs for various reasons. (pauloferreirafan.net)