Wiktionary
vb. To listen.
Wikipedia
Lend an Ear is a musical revue with a book, music, and lyrics by Charles Gaynor and additional sketches by Joseph Stein and Will Glickman.
Usage examples of "lend an ear".
Every day, every instant, he heard them walking on the other side of the wall, he heard them go, and come, and speak, and he did not even lend an ear!
Watching him, as he contrived, while displaying over and over again from the edification of little Philip the magical properties of his repeating watch, to lend an ear to the particular problem exercising Leigh's mind, Mrs.
Thou and thy companion are my champions, and it would be churlish of me indeed not to lend an ear to thee.
Perhaps, for the short while of her stay, Elphaba would come out of that sulk and lend an ear to hear how troubling and trying Sarima's life was.
A wise ruler does not lend an ear only to his courtiers, but tries to understand how his subjects think, too.