Revolution record includes acoustic intro (3)
I believe the answer is:
lap
'revolution' is the definition.
(thesaurus)
'record includes acoustic intro' is the wordplay.
'record' becomes 'lp' (LP is an example**).
'includes' indicates putting letters inside.
'intro' indicates taking the first letters.
The first letter of 'acoustic' is 'a'.
'lp' enclosing 'a' is 'LAP'.
(Other definitions for lap that I've seen before include "Circuit of racetrack" , "revolution" , "Knees" , "Drink (like dog), circuit" , "place for small computer?" .)