The most common and most likely answer to this crossword clue is the 9 letter word ROUNDELAY
I've seen this crossword clue in The Times
R
O
U
N
D
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L
A
Y
More clues leading to the result ROUNDELAY
- After some drinks, see about a song
- Land not the first to be associated with revolutionary university song
- Song and dance about university backtracking
- Refrain from singing this? It might be loud near end of melody
- It’s only a rude version of song and dance
- Romancer making courante dance, right?
- Song and dance sequence featuring old lag
- Regularly feel lazy after some drinks and song
- Only a rude drunken song and dance
- Echo included in two songs making one
Buddy explains!

The straight part
We know that "song" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case song = roundelay.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ROUNDELAY mean?
ROUNDELAY noun- A poem or song having a line or phrase repeated at regular intervals.
- A dance in a circle.
- Anything having a round form; a roundel.