Drone accompanying bell perhaps, amazing thing (9)
I believe the answer is:
humdinger
'amazing thing' is the definition.
'humdinger' can be an answer for 'thing' (I have seen 'excellent thing' mean 'humdinger' so perhaps 'thing' could also mean 'humdinger'). I'm unsure of the 'amazing' bit.
'drone accompanying bell' is the wordplay.
'drone' becomes 'hum' (I've seen this before).
'accompanying bell' becomes 'dinger' (I can't explain this - if you can you should believe this answer much more).
'hum'+'dinger'='HUMDINGER'
'perhaps' is the link.
Can you help me to learn more?
(Other definitions for humdinger that I've seen before include "Excellent person or thing (colloq)" , "Excellent example" , "excellent specimen" , "something else" , "Slang for remarkable person or thing - a real wow!" .)