Former turn is accurate (5)
I believe the answer is:
exact
'is accurate' is the definition.
(associated in meaning)
'former turn' is the wordplay.
'former' becomes 'ex' (prefix meaning former or onetime).
'turn' becomes 'act' (theatre).
'ex'+'act'='EXACT'
(Other definitions for exact that I've seen before include "Strict" , "Absolutely accurate or correct" , "Spot-on" , "Explicit" , "far from improvised?" .)