Inside empty briefcase, fit dry bread (8)
I believe the answer is:
baguette
'bread' is the definition.
(baguette is a kind of bread)
'inside empty briefcase fit dry' is the wordplay.
'inside' means one lot of letters goes inside another.
'empty' says to hollow out the word (remove centre letters).
'fit' becomes 'ague' (I've seen this before**).
'dry' becomes 'tt' (abbreviation for teetotal).
'briefcase' with its middle removed is 'be'.
'ague'+'tt'='aguett'
'be' enclosing 'aguett' is 'BAGUETTE'.
(Other definitions for baguette that I've seen before include "Narrow French stick loaf" , "Long French breadstick" , "Long narrow French loaf" , "Get beaut of a French loaf" , "Bread roll" .)