Divert different trainee to be around conservationists (9)
I believe the answer is:
entertain
'divert' is the definition.
(I've seen this in another clue)
'different trainee to be around conservationists' is the wordplay.
'different' indicates an anagram (letters placed in a different order).
'to be around' means one lot of letters goes inside another.
'conservationists' becomes 'NT' (abbreviation for National Trust).
'trainee' is an anagram of 'eertain'.
'eertain' placed around 'nt' is 'ENTERTAIN'.
(Other definitions for entertain that I've seen before include "nurse" , "Think about" , "Amuse; host" , "Create a diversion" , "cheer" .)