Determined to get everything necessary (3)
I believe the answer is:
set
'determined' is the definition.
(I know that determined can be written as set)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for set that I've seen before include "box?" , "Fix; lay" , "See 16 Down" , "Create a puzzle" , "Scenery etc. for the stage" .)