straighten out

settle or put right; "we need to iron out our disagreements"

extricate from entanglement; "Can you disentangle the cord?"

change for the better; "The lazy student promised to reform"; "the habitual cheater finally saw the light"

make straight

make free from confusion or ambiguity; make clear; "Could you clarify these remarks?"; "Clear up the question of who is at fault"

put (things or places) in order; "Tidy up your room!"