Ban covers motors, both mid-range (4)
I believe the answer is:
veto
'ban covers motors' is the definition.
'veto' can be an answer for 'ban' (thesaurus). I'm not certain of the 'covers motors' bit.
'both mid-range' is the wordplay.
'both' becomes 'vet' (I can't explain this - if you can you should give a lot more credence to this answer).
'mid' indicates the central letters.
'range' becomes 'scope' ('scope' can be a synonym of 'range').
The centre of 'scope' is 'o'.
'vet'+'o'='VETO'
Can you help me to learn more?
(Other definitions for veto that I've seen before include "Refuse to authorise" , "Stop" , "Forbid; prohibition" , "Red light" , "Formally forbid" .)