It's short and possibly conical (7)
I believe the answer is:
laconic
'it's short' is the definition.
(synonyms)
'possibly conical' is the wordplay.
'possibly' is an anagram indicator.
'conical' anagrammed gives 'LACONIC'.
'and' acts as a link.
(Other definitions for laconic that I've seen before include "Col Cain (anag) - expressed in a few words" , "Terse in conical way" , "'Curt, terse (7)'" , "not saying much" , "Tersely spoken" .)