Literary figure we both know? (3,6,6)
I believe the answer is:
our mutual friend
'literary figure' is the definition.
(Our Mutual Friend is a Charles Dickens novel)
I cannot understand how the remainder of the clue works.
(Other definitions for our mutual friend that I've seen before include "you and I know and like" , "John Harmon" , "Novel" , "someone we both know" , "China we share" .)