Really, it's where to find Naomi saving time (2,5)
I believe the answer is:
in truth
'really' is the definition.
(synonyms)
'where to find naomi saving time' is the wordplay.
'where to find naomi' becomes 'in Ruth' (Naomi appears in the Book of Ruth in the Bible).
'saving' is an insertion indicator.
'time' becomes 't' (abbreviation).
'inruth' placed around 't' is 'IN TRUTH'.
'it's' is the link.
(Other definitions for in truth that I've seen before include "To be honest" , "Really" , "Actually" , "As a matter of fact" , "Honestly" .)