The most common and most likely answer to this crossword clue is the 8 letter word HOMESICK
I've seen this crossword clue in The Times
H
O
M
E
S
I
C
K
More clues leading to the result HOMESICK
- Off work, and why? Abroad, unhappily
- Missing address?
- Country person bearing some twisted longing for family again
- I’m shocked about missing daughter wanting to see family
- Nostalgic setter’s one into wine
- Unhappy being on unfamiliar ground, House gets laid off
- ,16 Missing family is OK at last, with the paramedic team, getting treatment
- This person in shock, I suspect, is longing to be elsewhere
- At hotel, Eskimo touring Cuba is longing for family
- Sort of nostalgic hayseed eating some nuts
Buddy explains!

The straight part
We know that "Abroad, unhappily" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case abroad, unhappily = homesick.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 HOMESICK mean?
HOMESICK adjective- (with for) missing one's home and family very much when away; nostalgic