I'm a twerp to rectify distortion of science-fiction (4,4)
I believe the answer is:
time warp
'distortion of science-fiction' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'i'm a twerp to rectify' is the wordplay.
'to rectify' indicates anagramming the letters (I've seen 'rectified' mean this).
'im'+'a'+'twerp'='imatwerp'
'imatwerp' with letters rearranged gives 'TIME WARP'.
Can you help me to learn more?
(Other definitions for time warp that I've seen before include "Distortion by which things can pass from one period to another" , "Imaginary distortion of space which allows travel to different periods" , "dance" , "Hypothetical discontinuity in the fourth dimension?" , "State where features of the past are present" .)