Located new diets (5)
I believe the answer is:
sited
'located' is the definition.
('site' can be a synonym of 'locate')
'new diets' is the wordplay.
'new' is an anagram indicator.
'diets' with letters rearranged gives 'SITED'.
(Other definitions for sited that I've seen before include "installed" , "Positioned" , "Put" , "Placed, located" , "Situated" .)