Bones is backing to win a song after starting to understand Latin (7)
I believe the answer is:
ulnaria
'bones' is the definition.
(I've seen this before)
'backing to win a song after starting to understand latin' is the wordplay.
'backing' is a reversal indicator.
'to win' indicates putting letters inside (some letters win or obtain others).
'song' becomes 'airn' (I can't explain this - if you can you should believe this answer much more).
'after' means one lot of letters go next to another.
'starting to' says to take the initial letters.
The initial letters of 'understand latin' is 'ul'.
'a' inserted into 'airn' is 'airan'.
'airan' backwards is 'naria'.
'naria' after 'ul' is 'ULNARIA'.
'is' acts as a link.
Can you help me to learn more?
(Another definition for ulnaria that I've seen is " bones".)