Short cut that's about right (4)
I believe the answer is:
curt
'short' is the definition.
('curt' can be a synonym of 'short')
'cut that's about right' is the wordplay.
'that's about' means one lot of letters goes inside another.
'right' becomes 'r' (common abbreviation).
'cut' going around 'r' is 'CURT'.
(Other definitions for curt that I've seen before include "Brief, dismissive" , "Unceremonious" , "Brief and to the point" , "Concise" , "Terse and laconic" .)