Talk of conservation? (12)
I believe the answer is:
conversation
'talk' is the definition.
(I've seen this before)
'of conservation?' is the wordplay.
'of' indicates anagramming the letters (the answer comes from or 'of' the letters).
'conservation' is an anagram of 'CONVERSATION'.
(Other definitions for conversation that I've seen before include "dialogue" , "discussion" , "Something to talk about?" , "Talk, chat" , "22 between people" .)