Concise, pithy (5)
I believe the answer is:
terse
I believe this is a double definition.
'concise' is the first definition.
(similar in meaning)
'pithy' is the second definition.
(I've seen this before)
(Other definitions for terse that I've seen before include "Curt - abrupt" , "Brusque among trees" , "Crisply brief" , "Briefly expressed" , "Abrupt, concise" .)