Put in order but barely in the Christian era (6)
I believe the answer is:
adjust
'put in order' is the definition.
(thesaurus)
'barely in the christian era' is the wordplay.
I cannot quite understand how this works, but
'barely' could be 'just' (synonyms) and 'just' is present in the answer.
The remaining letters 'ad' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'but' acts as a link.
Can you help me to learn more?
(Other definitions for adjust that I've seen before include "Tune" , "Adapt, regulate" , "Regulate, alter by small amount" , "Get used to" , "Adapt to new conditions" .)