Broken down. Please pass (6)
I believe the answer is:
elapse
'pass' is the definition.
(I know that pass can be written as elapse)
'broken down please' is the wordplay.
'broken down' indicates anagramming the letters.
'please' with letters rearranged gives 'ELAPSE'.
(Other definitions for elapse that I've seen before include "Tick by" , "'Pass by, as time (6)'" , "Pass away - asleep (anag)" , "Of time, pass by - please" , "Passing" .)