### Clue: Musical heroine joining Laurie in a song (5)
### Answer: ANNIE 
 ### Explanation: Definition: Musical heroine,joining Laurie in a song
  Double defn: 1st:  Little Orphan Annie or Annie Oakley, heroines in the musicals "Annie" and "Annie Get Your Gun" respectively, take your pick; and 2nd: Together,joining with Laurie to give the title of an old Scottish song whose earliest known version, perhaps closest to the original, has these (some quaint) lyrics:
*Maxwelton braes are bonnie, where early fa's the dew*
*Where me and Annie Laurie made up the promise true*
*Made up the promise true, and ne'er forget will I*
*And for bonnie Annie Laurie I'd lay doun my head and die*
*She's backit like the peacock, she's breistit like the swan*
*She's jimp aboot the middle, her waist ye weel may span*
*Her waist ye weel may span, and she has a rolling eye*
*And for bonnie Annie Laurie I'd lay doun my head and die.