Sun square Saturn (orb 1.8°) creates concrete friction between the two planets. The orb is very tight; this describes a stable character pattern more than a passing reaction.
Here, Sun in Scorpio in House 7 brings identity, ego, father figure, visibility, and direction into House 7 (relationship, confrontation, and the mirror of others), with Scorpio style (intensity, desire, crisis, secrecy, and invisible power); Saturn in Aquarius in House 10 brings discipline, constraint, endurance, and mastery into House 10 (vocation, status, responsibility, and public image), with Aquarius style (independence, networks, distance, and collective change).
Concrete friction: this aspect makes identity, ego, and father image meet Saturn pressure: confidence, recognition, or the father relationship may have to grow through duty, delay, judgment, authority, or fear of failure. Visible angle: Sun near the Descendant (orb 3.9°) touches an angle; this aspect is easier to notice through direct relationships, partners, opponents, and the way others are met. House 7 (relationship, confrontation, and the mirror of others) is in friction with House 10 (vocation, status, responsibility, and public image); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.