Shortsightedness of army opiates policy (6)
I believe the answer is:
myopia
'shortsightedness' is the definition.
(synonyms)
'of army opiates policy' is the wordplay.
'of' indicates the answer is hidden within the clue.
'MYOPIA' is hidden within 'army opiates policy'.
(Other definitions for myopia that I've seen before include "Short-sightedness" , "complaint" , "Condition of short sightedness" , "lack of long-term vision" , "vision problem" .)