26 across
Unsold
books
and
souvenirs
outside
front
of
airport
(10)
Unsold books and souvenirs outside front of airport (10)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Unsold books — remainders being those leftover copies no one bought. Take souvenirs, which gives you REMINDERS, and place front of airport (just the letter A) inside it, giving you REM-A-INDERS.