Short (5)
(Other definitions for terse that I've seen before include "Brief; abrupt" , "Sententious" , "Reset to be pithy" , "Pithy and concise" , "Using few words" .)
'short' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for brief that I've seen before include "Instructions for barrister" , "Terse" , "not lasting long" , "Short or concise" , "Succinct" .)
'short' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for concise that I've seen before include "Succinct" , "Short and pithy" , "Using few words" , "Brief, said in few words" , "Brief but comprehensive" .)