Frequently, poetically (3)
I believe the answer is:
oft
'frequently poetically' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oft that I've seen before include "Many a time to the poet." , "Consistently" , "(In poetry) frequently" , "''... in the stilly night'' (Moore melody)" , "Frequently, in verse" .)