Precise account written by young priest (8)
I believe the answer is:
accurate
'precise' is the definition.
(I know that precise can be written as accurate)
'account written by young priest' is the wordplay.
'account' becomes 'ac' (abbreviation).
'written by' says to put letters next to each other.
'young priest' becomes 'curate' (I've seen this before. I am not sure about the 'young' bit.).
'ac'+'curate'='ACCURATE'
Can you help me to learn more?
(Other definitions for accurate that I've seen before include "True!" , "carefully and precisely" , "faithful" , "Correct, free of error" , "Absolutely correct" .)