Answer:
The answer is indeed "a lengthy or extended metaphor".
Explanation:
In poetry, conceit is a metaphor that can take up a whole section of a poem, or even the entire poem. It is witty and intricate, comparing two very different things in an enthralling or unexpected way. John Donne was a poet famous for using conceit in his work. In his poem "The Sun Rising", he compares the sun to an intruder that comes to interrupt his time with his beloved one. The first stanza is as follows:
Busy old fool, unruly sun,
Why dost thou thus,
Through windows, and through curtains call on us?
Must to thy motions lovers' seasons run?
Saucy pedantic wretch, go chide
Late school boys and sour prentices,
Go tell court huntsmen that the king will ride,
Call country ants to harvest offices,
Love, all alike, no season knows nor clime,
Nor hours, days, months, which are the rags of time.
