Shame about hard Concise (5)
I believe the answer is:
pithy
'concise' is the definition.
('pithy' can be similar in meaning to 'concise')
'shame about hard' is the wordplay.
'shame' becomes 'pity' ('pity' can be a synonym of 'shame').
'about' is an insertion indicator.
'hard' becomes 'h'.
'pity' going around 'h' is 'PITHY'.
(Other definitions for pithy that I've seen before include "Brief, to the point" , "Concise and full of meaning" , "(Of language) terse, strongly expressive" , "Short and to the point" , "Short and sweet" .)