Impressions moved aside (5)
I believe the answer is:
ideas
'impressions' is the definition.
The answer and definition can be both related to thinking as well as being plural nouns.
Perhaps there's a link between them I don't understand?
'moved aside' is the wordplay.
'moved' is an anagram indicator.
'aside' is an anagram of 'IDEAS'.
Can you help me to learn more?
(Other definitions for ideas that I've seen before include "Thoughts from Sadie" , "Brain waves" , "plans" , "Thoughts, concepts" , "Theories" .)