sort out is a verb meaning "arrange or order by classes or categories". It carries 3 recorded senses.
make free from confusion or ambiguity; make clear
“Could you clarify these remarks?”
“Clear up the question of who is at fault”
punish in order to gain control or enforce obedience
“The teacher disciplined the pupils rather frequently”
Definitions, synonyms and semantic relations for sort out come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.