The majority of Native American nurses master procedure (8)
I believe the answer is:
approach
'procedure' is the definition.
(thesaurus)
'the majority of native american nurses master' is the wordplay.
'the majority of' means to remove the last letter (most but not all of the word is used).
'native american' becomes 'apache' (I've seen this before).
'nurses' is an insertion indicator.
'master' becomes 'pro'.
'apache' with its final letter taken away is 'apach'.
'apach' enclosing 'pro' is 'APPROACH'.
(Other definitions for approach that I've seen before include "attitude" , "technique" , "Offer" , "Come closer" , "Draw near or nearer to" .)