Body initially concealed in murderer's hut (5)
I believe the answer is:
cabin
'hut' is the definition.
(I've seen this before)
'body initially concealed in murderer's' is the wordplay.
'initially' says to take the initial letters.
'concealed in' is an insertion indicator.
'murderer' becomes 'cain' (Cain who killed Abel).
The first letter of 'body' is 'b'.
'b' placed into 'cain' is 'CABIN'.
(Other definitions for cabin that I've seen before include "Lodge or hut" , "class at sea?" , "Building" , "Railway signal box" , "Small wooden shelter" .)