Kept entertained (6)
I believe the answer is:
amused
'kept entertained' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for amused that I've seen before include "Medusa (anag)" , "Queen Victoria wasn't!" , "Mildly entertained by Medusa" , "Beguiled" , "Provoked mirth in" .)