Ruminates (5)
I believe the answer is:
muses
'ruminates' is the definition.
(I know this)
This is the entire clue.
(Other definitions for muses that I've seen before include "Nine Greek and Roman goddesses presiding over the arts" , "Contemplates" , "Clio, Euterpe, Terpsichore etc" , "In Greek and Roman myth, nine goddesses of the arts" , "Thinks" .)