To make a buzzer loud, takes power (4)
I believe the answer is:
Here is my best explanation:
'power' is the definition.
'to make a buzzer loud' is the wordplay.
'to make a buzzer' becomes 'bee' (I can't justify this - if you can you should believe this answer much more).
'loud' becomes 'f' (A musical term).
'takes' is the link.
(Other definitions for beef that I've seen before include "Muscle; meat; grievance", "Complaint; strength", "it's unacceptable for vegetarian", "Complain; meat", "Brawn; grumble", "Argument", "A meat", "Meat from cattle", "grouse" and "Meat of the cow".)