How do you say 'tidy up'?

1. What is another way to say tidy up?
2. What is the meaning of tidy up?
3. Is it clean up or tidy up?

What is another way to say tidy up?

straighten (up or out) arrange. pick up. neaten. draw up.

What is the meaning of tidy up?

to arrange or deal with something so that it is well or correctly finished I tidied up the report before handing it in.

Is it clean up or tidy up?

Clean up means put them away in their proper place. But! Tidy your room and tidy up your room are almost the same. Tidy up suggests that the action should be complete – don't tidy one part, you must tidy the whole room.