Melody with variations (5)
I believe the answer is:
theme
(Other definitions for theme that I've seen before include "Topic; melody" , "Thread, melody" , "Musical idea; topic" , "Motif, topic" , "Topical item" .)
I believe the answer is:
theme
(Other definitions for theme that I've seen before include "Topic; melody" , "Thread, melody" , "Musical idea; topic" , "Motif, topic" , "Topical item" .)