Greek philosopher greeting power flower (5)
I believe the answer is:
hippo
'greek philosopher' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'greeting power flower' is the wordplay.
'greeting' becomes 'hi' (hi is a kind of greeting).
'power' becomes 'p' (symbol in physics).
'flower' becomes 'Po' (Italian river).
'hi'+'p'+'po'='HIPPO'
Can you help me to learn more?
(Other definitions for hippo that I've seen before include "Aquatic pachyderm" , "Semiaquatic animal" , "One thick-skinned" , "Augustine looked after" , "Aquatic creature" .)