More than half of lyrics inspiring surprising hit by tenor (3-6)

'more than half' is the definition.
I can't tell whether this definition defines the answer.

'lyrics inspiring surprising hit by tenor' is the wordplay.
'lyrics' becomes 'words' (I've seen this in another clue).
'inspiring' is an insertion indicator.
'surprising' indicates anagramming the letters.
'by' says to put letters next to each other.
'tenor' becomes 't'.
'hit' anagrammed gives 'thi'.
'words' placed around 'thi' is 'wothirds'.
'wothirds' after 't' is 'TWO-THIRDS'.

'of' is the link.

Can you help me to learn more?