Song and dance, regularly, with beautiful Greek (7)
I believe the answer is:
ariadne
'beautiful greek' is the definition.
'ariadne' can be an answer for 'greek' (I have seen 'Mythological Greek' mean 'ariadne' so perhaps 'greek' could also mean 'ariadne'). I'm not certain of the 'beautiful' bit.
'song and dance regularly' is the wordplay.
'song' becomes 'aria' (piece of music in an opera).
'and' says to put letters next to each other.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternating letters of 'dance' are 'dne'.
'aria'+'dne'='ARIADNE'
'with' is the link.
Can you help me to learn more?
(Other definitions for ariadne that I've seen before include "Girl in the Minotaur myth" , "She helped Theseus escape from the Minotaur's labyrinth" , "She aided Theseus against the Minotaur" , "Successful at stringing lover along" , "subject of opera" .)