The most common and most likely answer to this crossword clue is the 6 letter word ECLAIR
I've seen this crossword clue in The Times
E
C
L
A
I
R
More clues leading to the result ECLAIR
- English girl said to be a sweet little thing
- Eastern girl said to be delicious thing
- Tasty item in extremely exotic retreat
- Clear I cooked a rich dessert
- Rich dessert found back in imperial Ceylon
- Cake, high calorie, nothing left
- Is this where bankers are hiding cream cake?
- With knife at last, girl cut cake
- Cereal covers a large upside-down cake
- Girl's last to start making cake
Buddy explains!

The straight part
We know that "cake" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cake = eclair.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 ECLAIR mean?
ECLAIR noun- An oblong, chocolate-covered, cream-filled pastry.