Go by in order, please (6)
I believe the answer is:
elapse
'go by' is the definition.
('elapse' can be a synonym of 'go by')
'order please' is the wordplay.
'order' indicates an anagram.
'please' with letters rearranged gives 'ELAPSE'.
'in' acts as a link.
(Other definitions for elapse that I've seen before include "'Pass by, as time (6)'" , "Of time, pass by - please" , "Go by - pass away" , "run by" , "pass in silence" .)