Crossword clue: to touch closely, so as to have a common curvature at the point of contact. see osculation, 2.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, e