The most common and most likely answer to this crossword clue is the 6 letter word TOASTY
I've seen this crossword clue in Independent
T
O
A
S
T
Y
More clues leading to the result TOASTY
- Where pig may go to be cosily warm
- Warm turkey without stuffing in oven? On the contrary
- Well heated, for a hovel
- Warm to extremely audacious tearaway
- Duck inside, nice and warm
- Warm to a place of debauchery
- Warm to a beastly home
- Warm oven in Tipperary, emptied
- Warm to a dirty home
- Warm tribute before close of play
Buddy explains!

The straight part
We know that "warm" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case warm = toasty.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 TOASTY mean?
TOASTY adjective- Resembling or characteristic of toast.
- Pleasantly warm