Summary I get on accuracy (9)
I believe the answer is:
precision
'accuracy' is the definition.
(precision is a kind of accuracy)
'summary i get on' is the wordplay.
'summary' becomes 'precis' (precis is a kind of summary**).
'get' says to put letters next to each other.
'precis'+'i'+'on'='PRECISION'
(Other definitions for precision that I've seen before include "Meticulousness" , "Exactness, sharpness" , "Care" , "Exactitude" , "Accuracy, exactness" .)