The most common and most likely answer to this crossword clue is the 5 letter word AWAKE
I've seen this crossword clue in Financial Times
A
W
A
K
E
More clues leading to the result AWAKE
- Vigilant, one following a boat
- Where mourners might be attentive
- Come to a vigil for the departed
- No longer asleep — needing a wash?
- Come to a funeral party
- A thing seen behind ship tossing and turning?
- Conscious of a watch on dead body
- … alert after a wash
- Sleepless and feeble with no energy in hospital department
- Aroused by adult party in Ireland
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 AWAKE mean?
AWAKE adjective- Not asleep; conscious.
- (by extension) Alert, aware.
- To become conscious after having slept.
- To cause (somebody) to stop sleeping.
- To excite or to stir up something latent.
- To rouse from a state of inaction or dormancy.
- To come out of a state of inaction or dormancy.