Remove unrealistic summary (8)
I believe the answer is:
abstract
This might be a double definition.
'remove' is the first definition.
(abstract can mean to extract or remove)
'unrealistic summary' is the second definition.
'abstract' can be an answer for 'summary' (abstract is a kind of summary). I'm not sure about the 'unrealistic' bit.
Can you help me to learn more?
(Other definitions for abstract that I've seen before include "Rothko work?" , "Extract; summary" , "Summary (of an article)" , "Take away - what can't be seen" , "Art form; remove" .)