Acceptance of taking our time over choice (8)
I believe the answer is:
adoption
'acceptance' is the definition.
(synonyms)
'our time over choice' is the wordplay.
'our time' becomes 'ad' (AD, Anno Domini, as opposed to BC, Before Christ).
'over' is a charade indicator (letters next to each other).
'choice' becomes 'option' (synonyms).
'ad'+'option'='ADOPTION'
'of taking' is the link.
(Other definitions for adoption that I've seen before include "Choosing (of a candidate for office)" , "Espousal, a fostering" , "Endorsement" , "Process of taking on another's child" , "The taking on of someone else's child" .)