Rattle record object in packing-case (9)
I believe the answer is:
crepitate
'rattle' is the definition.
(I know that crepitate is a kind of rattle)
'record object in packing-case' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'object' becomes 'it' (pronoun for an inanimate object).
'in' means one lot of letters goes inside another.
'packing case' becomes 'crate' (I've seen this in another clue).
'ep'+'it'='epit'
'epit' put into 'crate' is 'CREPITATE'.
(Another definition for crepitate that I've seen is " rattle".)