Break fivers to yen, and make a poem (7)
I believe the answer is:
versify
'break' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how one could define the other.
'fivers to yen and make a poem' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'fivers' is 'versif' which is present in the answer.
'yen' could be 'y' (resembles the symbol for the currency of Japan) and 'y' is found within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for versify that I've seen before include "Write poetry" , "Produce poetry" , "Compose poems" .)