Nothing disturbing primate’s idleness (7)
I believe the answer is:
languor
'idleness' is the definition.
(thesaurus)
'nothing disturbing primate's' is the wordplay.
I cannot really see how this works, but
'nothing' could be 'o' (O resembles 0) and 'o' is located in the answer.
'primate' could be 'langur' (langur is a kind of primate) and 'langur' is present in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for languor that I've seen before include "Lack of energy" , "Feeling of boredom or feebleness" , "Dreamy inertia" , "Pleasurable inactivity" , "Indolence" .)