A tongue might seem familiar (4,1,4)
I believe the answer is:
ring a bell
'seem familiar' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for ring a bell that I've seen before include "Town crier may" , "Contribute to ding-dong" , "Begin to rouse memory" , "sound vaguely familiar" , "faintly resonate" .)