Tin Pan Alley product (4)
I believe the answer is:
song
'tin pan alley product' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for song that I've seen before include "Lied" , "See 17" , "Musical composition with words" , "Ballad, aria" , "Melody (which is cheap to go for)" .)