Indulge in campanology - sound familiar? (4,1,4)
I believe the answer is:
ring a bell
'sound familiar?' is the definition.
(something which seems familiar rings a bell)
'indulge in campanology' is the wordplay.
I cannot really understand how this works, but
'in' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ring a bell that I've seen before include "Signal to start class" , "Revive a dim memory" , "Advice to cyclist" , "to remind one of something" , "sound vaguely familiar" .)