In this sense, the primary subject is spoken of and thought about in terms of the secondary subject. It is easy to feel that in Romeo’s metaphor, familiar fragments of sun-talk come to be about Juliet without ceasing to be about the sun. If so, the double aboutness exhibited by metaphorical language is something philosophers must strive to understand.
The SEP on metaphor (apologies if the wrong stackexchange).
Can the same be said about metonymy? If we call bureaucracy "red tape" are we still talking about tape?