Poem put into faster time (2-5)
I believe the answer is:
'into faster time' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'poem' is the wordplay.
I cannot quite see how this works, but
an anagram of 'poem' is 'empo' which is present in the answer.
This explanation may well be incorrect...
'put' acts as a link.
Can you help me to learn more?
(Other definitions for up-tempo that I've seen before include "Played or sung at a fast speed", "(Of music) played at fast speed", "played quickly", "Quick, cheerful (piece of music)", "Musically, played (increasingly) fast".)