Secures or releases supplies (9)
I believe the answer is:
resources
'supplies' is the definition.
(I've seen this before)
'secures or releases' is the wordplay.
'releases' is an anagram indicator (I've seen 'released' mean this (letters released from their original order)).
'secures'+'or'='securesor'
'securesor' anagrammed gives 'RESOURCES'.
(Other definitions for resources that I've seen before include "capital!" , "Personal attributes" , "country's means of defence" , "Teaching materials" , "funds" .)