Obsessive Preoccupation With One Thing

This page is the CodyCross answer for the clue below from Renaissance, Group 1389, Puzzle 3 (Christine De Pizan).

Question is: Obsessive Preoccupation With One Thing

and the answer is: MONOMANIA

Word Meaning:

MONOMANIA — Excessive interest or concentration on a singular object or subject.

Definitions from Wiktionary.