Greek character with ukulele originally more musical (3)

'greek character with ukulele originally more musical' is the definition.
I can't judge whether this defines the answer.

'greek character with ukulele originally' is the wordplay.
'greek character' becomes 'pi' (letter from the Greek alphabet).
'with' is a charade indicator (letters next to each other).
'originally' suggests taking the first letters.
The initial letter of 'ukulele' is 'u'.
'pi'+'u'='PIU'

Can you help me to learn more?