Get a lute out, giving instruction (8)
I believe the answer is:
tutelage
'instruction' is the definition.
(tutelage is instructing or teaching)
'get a lute out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'get'+'a'+'lute'='getalute'
'getalute' with letters rearranged gives 'TUTELAGE'.
'giving' is the link.
(Other definitions for tutelage that I've seen before include "Protection" , "Tuition" , "Office of tutor or guardian" , "guidance" , "Training" .)