The most common and most likely answer to this crossword clue is the 6 letter word ASLEEP
I've seen this crossword clue in The Times
A
S
L
E
E
P
More clues leading to the result ASLEEP
- Was repelling wife with revolting skin like a kipper
- Like kippers? Please, but done properly
- Poisoner keeps being sheltered, having got off
- Like skin turned out?
- Head of army strips standing up in bed?
- In bed and snoring? Turn around please!
- Like raised skin lacking sensation
- Poisoner catches American general napping
- Unconscious energy in lapse, unfortunately
- Dozing snake has secured shelter
Buddy explains!

The straight part
We know that "lacking sensation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lacking sensation = asleep.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 ASLEEP mean?
ASLEEP adjective- In a state of sleep; also, broadly, resting.
- Inattentive.
- (of a body part) Having a numb or prickling sensation accompanied by a degree of unresponsiveness.
- Dead