On the luggage rack, the item that dropped off? (8,3)
I believe the answer is:
sleeping bag
'item that dropped off?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'on the luggage rack' is the wordplay.
'on' is a charade indicator (letters next to each other).
'the luggage' becomes 'bag' (bag is a kind of luggage).
'rack' becomes 'sleeping' (I can't explain this - if you can you should believe this answer much more).
'bag' put after 'sleeping' is 'SLEEPING-BAG'.
'the' is the link.
Can you help me to learn more?
(Other definitions for sleeping bag that I've seen before include "Camper's warmer" , "Something campers use - e.g. being pals (anag)" , "Camping equipment" , "Camping item" , "Camper's item" .)