Call it a night' is an idiom that means to end something, usually for the day. The crossword solutions for this term are RETIRE, gohome, and turnin. RETIRE means to withdraw from one's job or position, gohome means to return to one's home, and turnin means to submit or hand in something. Therefore, the phrase 'call it a night' can be interpreted as withdrawing from one's job or position, returning home, and submitting or handing in something.