# For this purpose I left you in Crete, that you might set

"This is the reason I left you in Crete: I wanted you to set"

# I left you in Crete

"I told you to stay in Crete"

# set in order things not yet complete

"finish arranging things that needed to be done"

# ordain elders

"appoint elders" 

# elders

In the early Christian churches, Christian elders gave spiritual leadership to the assemblies of believers.