Pithy (7)
I believe the answer is:
laconic
'pithy' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for laconic that I've seen before include "Terse - can coil (anag)" , "Conical (anag) - pithy" , "Conical (anag) -- brief and to the point" , "with little expression" , "Spartan" .)