Hut not exactly the place for junk (5)
I believe the answer is:
cabin
'hut' is the definition.
(I've seen this before)
'not exactly the place for junk' is the wordplay.
'not exactly' becomes 'ca' (circa).
'the place for junk' becomes 'bin' (rubbish bin).
'ca'+'bin'='CABIN'
(Other definitions for cabin that I've seen before include "Ship's sleeping room" , "modest accommodation" , "Compartment on a ship" , "Marine digs" , "Small room on a ship" .)