The shed has a taxi in (5)
I believe the answer is:
cabin
'the shed' is the definition.
(both can mean a small hut or shelter)
'a taxi in' is the wordplay.
'a taxi' becomes 'cab' (synonyms).
'cab'+'in'='CABIN'
'has' acts as a link.
(Other definitions for cabin that I've seen before include "Lodge or hut" , "Railway signal box" , "class at sea?" , "Private room aboard" , "Hamper" .)