The most common and most likely answer to this crossword clue is the 3 plus 3 plus 3 letter word TEA FOR TWO
I've seen this crossword clue in The Times
T
E
A
F
O
R
T
W
O
More clues leading to the result TEA FOR TWO
- Air foul footwear after short time
- Tango with novel footwear in song from musical
- Song from old musical, tap-danced originally with special footwear
- Devastate a fort wounding number inside!
- Musical number requiring tenor with nifty footwear
- Classic wrong to fear anything from the right
- We’re told a letter and a number as well, a number in the 20s
- Far too wet to go out; share a drink instead?
- A number of split leaves?
- Musical number outlining couple’s four o’clock order?
Buddy explains!
The straight part
We know that "Song from old musical" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case song from old musical = tea for two.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.