Gezer: Canaanites not all Expelled From, but Made to Pay Tribute (Taxes)
Source: Nav
Joshua 16:10
But they did not drive out the Canaanites who lived in Gezer. So the Canaanites dwell among the Ephraimites to this day, but they are forced laborers.
Judges 1:29
Ephraim also failed to drive out the Canaanites living in Gezer; so the Canaanites continued to dwell among them in Gezer.