The most common and most likely answer to this crossword clue is the 6 letter word TISANE
I've seen this crossword clue in Independent
T
I
S
A
N
E
More clues leading to the result TISANE
- Infusion one’s served in lightish brown earthenware, primarily
- Infusion all there is after this, oddly
- Drink neat rum when touring island
- Eats in mess for tea
- It’s possibly an English drink such as camomile tea
- Herbal infusion from one of the cordylines, healthy
- A drink of claret is an exception
- Infusion — put it back together
- It’s possibly an energy drink like tea
- Vermouth knocked back, sensible drink
Buddy explains!

The straight part
We know that "tea" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tea = tisane.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 TISANE mean?
TISANE noun- A medicinal drink, originally made from barley soaked in water.