The most common and most likely answer to this crossword clue is the 6 letter word SCONES
S
C
O
N
E
S
Buddy explains!

The straight part
We know that "Tea-time treats" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tea-time treats = scones.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 SCONES mean?
SCONES noun- A small, rich, pastry or quick bread, sometimes baked on a griddle.
- (Utah) Frybread served with honey butter spread on it.
- The head.