The most common and most likely answer to this crossword clue is the 7 letter word LOLLING
I've seen this crossword clue in The Daily Telegraph
L
O
L
L
I
N
G
More clues leading to the result LOLLING
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 LOLLING mean?
LOLLING verb- To laugh out loud.
- To act lazily or indolently while reclining; to lean; to lie at ease.
- To hang extended from the mouth, like the tongue of an animal heated from exertion.
- To let (the tongue) hang from the mouth in this way.
- The act of one who lolls.