Awfully nice chat with Latin specialist (9)
I believe the answer is:
technical
'specialist' is the definition.
(I've seen this before)
'awfully nice chat with latin' is the wordplay.
'awfully' indicates an anagram.
'with' is a charade indicator (letters next to each other).
'latin' becomes 'l'.
'nice'+'chat'='nicechat'
'nicechat' anagrammed gives 'technica'.
'technica'+'l'='TECHNICAL'
(Other definitions for technical that I've seen before include "Requiring special knowledge to be understood" , "Concerned with applied sciences" , "- Drawing; - foul" , "Relating to mechanical art or applied science" , "Industrial" .)