Liberal in concern, showing quality of character (7)
I believe the answer is:
calibre
'quality of character' is the definition.
(I've seen this before)
'liberal in concern' is the wordplay.
'liberal' becomes 'lib'.
'in' indicates putting letters inside.
'concern' becomes 'care' ('care' can be a synonym of 'concern').
'lib' inserted into 'care' is 'CALIBRE'.
'showing' acts as a link.
(Other definitions for calibre that I've seen before include "Diameter of a gun barrel" , "Personal character" , "measure of a bore" , "Diameter of bullet or shell" , "gifts" .)