Literary character spelled out by the first letters of this puzzle's circled words (6)
I believe the answer is:
jekyll
(Other definitions for jekyll that I've seen before include "Hyde's alter ego" , "Famous novel: 'Dr . . . . . . and Mr Hyde'" , "The good personality (see 18)" , "Alter ego of 19 (Stevenson)" , "Robert Louis Stevenson novel 'Dr . . . . . . and Mr Hyde'" .)