Crossword clue: a reciprocal relation between interdependent entities (objects or individuals or groups)
2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
a reciprocal relation between interdependent entities (objects or individuals or groups)
a reciprocal relation between interdependent entities (objects or individuals or groups)