The most common and most likely answer to this crossword clue is the 7 letter word CALYPSO
I've seen this crossword clue in Independent
C
A
L
Y
P
S
O
More clues leading to the result CALYPSO
- Music from revolutionary agent welcomed to state ball
- Combo's leader plays new love song
- Pacy solo almost fluffed in Caribbean ballad
- Nymph's song
- Company plays lively WI music
- Nymph plays around when in company
- Originally Caribbeans play loosely like this?
- Song about leaving Cyclops with a mess
- Nymph plays hard to get in company
- Wretched Cyclops gives head for a song
Buddy explains!

The straight part
We know that "WI music" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wi music = calypso.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 CALYPSO mean?
CALYPSO noun- A type of music and dance that originated in the West Indies (perhaps Trinidad), characterized by improvised lyrics on topical or broadly humorous subjects, often creating satire of current events.
- To perform calypso.
- A bulbous bog orchid of the genus Calypso, Calypso bulbosa
- A light blue color.