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general::
Phrase(s): *a vested interest in something
Fig. a personal or biased interest, often financial, in something. (*Typically: have ~; give someone ~.) • Margaret has a vested interest in wanting her father to sell the family firm. She has shares in it and would make a large profit. • Bob has a vested interest in keeping the village traffic-free. He has a summer home there.
McGrawhill's American Idioms And Phrasal Verbs