Near back of hut it's dark (5)
I believe the answer is:
night
'dark' is the definition.
(night is a kind of dark)
'near back of hut' is the wordplay.
'near' becomes 'nigh' ('nigh' can be a synonym of 'near'**).
'back of' indicates one should take the final letters.
The final letter of 'hut' is 't'.
'nigh'+'t'='NIGHT'
'it's' acts as a link.
(Other definitions for night that I've seen before include "The dark time" , "Hours of darkness" , "Illumination needed now" , "See 8" , "Time for turning" .)