Continuous-play tape (4)
I believe the answer is:
loop
'continuous-play tape' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for loop that I've seen before include "Endless strip of tape" , "ring road, say" , "(Of aircraft) make a circle vertically" , "Contraception device - hearing aid" , "Aerobatic manoeuvre" .)