The most common and most likely answer to this crossword clue is the 9 letter word DEHYDRATE
I've seen this crossword clue in Independent
D
E
H
Y
D
R
A
T
E
More clues leading to the result DEHYDRATE
- Lose water that's heated - dry out
- Dry-heated, possibly, to do this?
- Lose water that’s heated, and dry out
- He’d turned up late, turning up with vehicle finally dry
- Dry-eyed husband angrily stifling curses
- Heated and dry, awfully dry
- Lose water and they dread to metamorphose
- After downpour initially, day three surprisingly dry
- They dread springs becoming dry
- Dry heated ingredients turning dry
Buddy explains!

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 DEHYDRATE mean?
DEHYDRATE verb- To lose or remove water; to dry