Crack base on the gramophone? (4)
I believe the answer is:
flaw
'crack' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for flaw that I've seen before include "Mark, blemish" , "Weakness" , "weak spot" , "(Make) defect(ive)" , "failing" .)