Put on, at the present time, the deducted part (5)
I believe the answer is:
added
'put on' is the definition.
(add can mean to put on)
'at the present time the deducted part' is the wordplay.
'at' is a charade indicator (letters next to each other).
'the present time' becomes 'AD' (AD, Anno Domini, as opposed to BC, Before Christ).
'the deducted part' becomes 'ded' (I can't explain this - if you can you should believe this answer much more).
'ad' put next to 'ded' is 'ADDED'.
Can you help me to learn more?
(Other definitions for added that I've seen before include "Summed up" , "Appended; totalled" , "Contributed" , "Counted up" , "Totted" .)