Actress Kelly or ballerina Shearer (5)
I believe the answer is:
moira
This clue is a double definition.
'actress kelly' is the first definition.
(I've seen this in another clue)
'ballerina shearer' is the second definition.
(I've seen this in another clue)
(Other definitions for moira that I've seen before include "Shearer, possibly" , "- - Shearer, actress-ballerina" , "Girl" , "Shearer perhaps" , "Any of the three Greek Fates" .)