True account by junior minister (8)
I believe the answer is:
accurate
'true' is the definition.
(similar in meaning)
'account by junior minister' is the wordplay.
'account' becomes 'ac' (abbreviation for account).
'by' says to put letters next to each other.
'junior minister' becomes 'curate'.
'ac'+'curate'='ACCURATE'
(Other definitions for accurate that I've seen before include "not deviating from the truth?" , "Careful, precise" , "telling it like it is" , "strict" , "Totally correct" .)