The question revolves around Sonnet 11 by Elizabeth Barrett Browning. The exact lines are:
This weary minstrel-life that once was girt To climb Aornus, and can scarce avail To pipe now 'gainst the valley nightingale A melancholy music
There are many interpretations for the poem. It could be dealing with a secret love, unrequited love or just a love story. The character has become tired that she cannot love anymore how she loved in the past, she just became weaker. The author applies this allusion in order to clarify that meaning.