The most common and most likely answer to this crossword clue is the 5 letter word KILNS
I've seen this crossword clue in The Daily Telegraph
K
I
L
N
S
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 KILNS mean?
KILNS noun- An oven or furnace or a heated chamber, for the purpose of hardening, burning, calcining or drying anything; for example, firing ceramics, curing or preserving tobacco, or drying grain.
- To bake in a kiln.