Drive back concerned with vibration (7)
I believe the answer is:
repulse
'drive back' is the definition.
(synonyms)
'concerned with vibration' is the wordplay.
'concerned with' becomes 're' ('re' means regarding or about).
'vibration' becomes 'pulse' (I've seen this before).
're'+'pulse'='REPULSE'
(Other definitions for repulse that I've seen before include "Disgust" , "Beat off -- rebuff" , "Cause to feel intense aversion" , "Beat back" , "Repel" .)