Body in the baggage (5)
I believe the answer is:
trunk
I believe this clue is a double definition.
'body' is the first definition.
(I know that body can be written as trunk)
'the baggage' is the second definition.
(trunk is a kind of baggage)
'in' is the link.
(Other definitions for trunk that I've seen before include "Baggage item" , "Large luggage case" , "Part of a tree - part of an elephant" , "Elephant's nose" , "Travellers chest" .)