The most common and most likely answer to this crossword clue is the 7 letter word WISTFUL
W
I
S
T
F
U
L
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 WISTFUL mean?
WISTFUL adjective- Full of longing or yearning.
- Sad and thoughtful.