The most common and most likely answer to this crossword clue is the 7 letter word TARTLET
I've seen this crossword clue in The Times
T
A
R
T
L
E
T
More clues leading to the result TARTLET
- Pork pie must ultimately include right type of pastry
- Biting rent in an open case full of sweet bits?
- Pastry‘s sour: bit of tarragon the French included
- Tense after biting the French pastry
- Restraint needed after cutting sweet pastry
- Diminutive pastry later recreated in Trinidad and Tobago
- Bright young thing loses head but has time for a pie
- Foodstuff allowed after trial that’s enthralled Arkansas
- Pastry later baked during Manx event
- She’s not given to startle the sweet wee thing!
Buddy explains!

The straight part
We know that "type of pastry" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case type of pastry = tartlet.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.