After mix-up in pit man at last removed drums (7)
I believe the answer is:
timpani
'drums' is the definition.
(type of drums)
'after mix-up in pit man at last removed' is the wordplay.
I cannot quite understand how this works, but
'man' could be 'tim' (short for Timothy) and 'tim' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for timpani that I've seen before include "Mini tap on a large drum" , "Set of kettledrums" , "Features of kitchen" , "Those beaten" , "Percussion instrument" .)