Aides trained to make plans (5)
I believe the answer is:
ideas
'plans' is the definition.
(idea can mean a plan or intention)
'aides trained' is the wordplay.
'trained' is an anagram indicator (to train can mean to grow something into a shape).
'aides' anagrammed gives 'IDEAS'.
'to make' is the link.
(Other definitions for ideas that I've seen before include "Thoughts from Sadie" , "Notions, thoughts" , "Thoughts, personal views" , "Thoughts or opinions" , "thinking" .)