Aide skewed impression (4)
I believe the answer is:
idea
'impression' is the definition.
(I've seen this in another clue)
'aide skewed' is the wordplay.
'skewed' is an anagram indicator.
'aide' anagrammed gives 'IDEA'.
(Other definitions for idea that I've seen before include "A suspicion of" , "Creative spark" , "Thought, belief" , "Light bulb above head" , "Notion in the mind" .)