The most common and most likely answer to this crossword clue is the 7 letter word GALATEA
I've seen this crossword clue in The Guardian
G
A
L
A
T
E
A
More clues leading to the result GALATEA
- Nymph coming to life, having light refreshment in a marquee?
- Celebration drink for statuesque maiden
- Fabulous Greek girl dined during festival
- Pygmalion’s work put away during social event
- Celebration drink for Pygmalion’s love
- Maiden brought to life by drink after festival
- Girl given a drink — stony one brought to life
- Four qts consumed by a statue that came to life
- Party drink for a Greek nymph
Buddy explains!

The straight part
We know that "Fabulous Greek girl" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fabulous greek girl = galatea.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.