I'm not engaging with tiresome, broken record player (6)
I believe the answer is:
stereo
'engaging with tiresome broken record player' is the definition.
'stereo' can be an answer for 'player' (I've seen this before). I am not certain of the 'engaging with tiresome broken record' bit.
'i'm not' is the wordplay.
'i'm' becomes 'stere' (I can't explain this - if you can you should believe this answer much more).
'not' becomes 'o' (I've seen this in other clues).
'stere'+'o'='STEREO'
Can you help me to learn more?
(Other definitions for stereo that I've seen before include "Record-player" , "Sound - not mono" , "System that gives a three-dimensional sound" , "When sound comes through two channels" , "Record player" .)