Wrongly thought to have said “in mid-cut” (8)
I believe the answer is:
misheard
'wrongly thought to have said' is the definition.
I can't judge whether this defines the answer.
'in mid-cut' is the wordplay.
'in' means one lot of letters goes inside another.
'cut' becomes 'shear' (shearing is a kind of cutting).
'mid' enclosing 'shear' is 'MISHEARD'.
Can you help me to learn more?
(Other definitions for misheard that I've seen before include "wrongly caught" , "Picked up by inattentive" , "Caught (words) incorrectly" , "(Of speech) not understood correctly" , "Chinese whispers are usually" .)