I felt DIY training is required to get accuracy (8)
I believe the answer is:
fidelity
'accuracy' is the definition.
(fidelity is a kind of accuracy)
'i felt diy training' is the wordplay.
'training' indicates anagramming the letters (to train can mean to grow something into a shape).
'i'+'felt'+'diy'='ifeltdiy'
'ifeltdiy' anagrammed gives 'FIDELITY'.
'is required to get' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for fidelity that I've seen before include "Devotion" , "Tidy file (anag)" , "Faithfulness" , "The quality of being faithful" , "Honesty" .)