Film music from Keith Emerson (5)

I believe the answer is:

theme

'film music' is the definition.
(a musical theme)

'from keith emerson' is the wordplay.
'from' says the answer is hidden in the clue.
'THEME' is hidden within 'keith emerson'.

(Other definitions for theme that I've seen before include "basis for variations" , "Subject (of talk, text, etc)" , "Topic; melody" , "Burden" , "Topic, leitmotif" .)

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