Earthquake centre (5)
I believe the answer is:
heart
This clue could be a double definition.
'earthquake' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'centre' is the second definition.
(I know that centre can be written as heart)
Can you help me to learn more?
(Other definitions for heart that I've seen before include "Muscular organ - compassion" , "Core, courage" , "Playing card - pity" , "Decorated (cake)" , "one needs to beat" .)