click into place
1. Literally, of an object, to fit securely into something, often with an audible clicking noise. My seatbelt isn't clicking into place—is it broken?
2. By extension, to begin to make sense or be understood. Thanks to my tutor, this week's lesson on polynomials has finally clicked into place.
click into place
become suddenly clear and understandable. Click into place is used literally of an object, especially part of a mechanism, to mean ‘fall smoothly into its allotted position’.