Place of refreshment has nothing unaltered (5)
I believe the answer is:
oasis
'place of refreshment' is the definition.
(I've seen this before)
'nothing unaltered' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'unaltered' becomes 'asis' (I've seen this in other clues).
'o'+'asis'='OASIS'
'has' acts as a link.
(Other definitions for oasis that I've seen before include "Peaceful area away from trouble" , "Green area in desert" , "Fertile spot in desert" , "Peaceful spot" , "quiet spot" .)