To make a buzzer loud, takes power (4)
I believe the answer is:
beef
'power' is the definition.
(thesaurus)
'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).
'bee'+'f'='BEEF'
'takes' is the link.
Can you help me to learn more?
(Other definitions for beef that I've seen before include "it's unacceptable for vegetarian" , "Brawn; complaint" , "Complaint; strength" , "Argument" , "Brawn; grumble" .)