Instruction isn't leaving institution in turmoil (7)
I believe the answer is:
tuition
'instruction' is the definition.
(I know that tuition is a type of instruction)
'isn't leaving institution in turmoil' is the wordplay.
'leaving' suggests deleting specific letters.
'in turmoil' indicates anagramming the letters (I've seen this in other clues).
'institution' with 'isnt' taken out is 'itution'.
'itution' is an anagram of 'TUITION'.
(Other definitions for tuition that I've seen before include "(Individual) instruction" , "practice" , "Lessons" , "Teaching, often one-to-one" , "Training" .)