Recording band (4)
I believe the answer is:
tape
I believe this clue is a double definition.
'recording' is the first definition.
(I know that tape is a type of recording)
'band' is the second definition.
(I've seen this before)
(Other definitions for tape that I've seen before include "Magnetic recording medium; measuring strip" , "Sticky strip" , "Race finishing line strip" , "The winning runner breasts the ...." , "that race winner may break" .)