If the ClickHome database is set to simple mode - then it would not be running transactions - and hence not responsible for the tempdb growth - but this is just an educated guess not firm knowledge.


Things that could be changed to improve the situation would be reducing the data contained in existing queries on ClickHome, or even other systems.


Here is an article which could provide helpful. 


http://dba.stackexchange.com/questions/19870/how-to-identify-which-query-is-filling-up-the-tempdb-transaction-log