Poetic measures (4)
I believe the answer is:
feet
'poetic measures' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for feet that I've seen before include "Paws" , "Three of these in yard" , "Have both on the ground to be practical" , "Body parts; lengths" , "Linear Units of a third of a yard" .)