Raid ruined without water (4)
I believe the answer is:
arid
'without water' is the definition.
(I've seen this before)
'raid ruined' is the wordplay.
'ruined' indicates anagramming the letters.
'raid' anagrammed gives 'ARID'.
(Other definitions for arid that I've seen before include "Parched and barren" , "Dry and parched, as with regions" , "Sterile" , "Dry and withered" , "Dry raid" .)