Run over court case and concentrate (7)
I believe the answer is:
extract
'concentrate' is the definition.
(I've seen this before)
'run over court case' is the wordplay.
'run' becomes 'extra' (cricket run**).
'over' means one lot of letters go next to another.
'case' suggests removing the centre.
'court' with its middle removed is 'ct'.
'extra'+'ct'='EXTRACT'
'and' is the link.
(Other definitions for extract that I've seen before include "Pull or take out - maybe a tooth" , "Draw or pull out" , "short passage from a book" , "Find out" , "Separate, in a mining sense" .)