Please reform and pass (6)
I believe the answer is:
elapse
'pass' is the definition.
(I know that pass can be written as elapse)
'please reform' is the wordplay.
'reform' indicates anagramming the letters (letters in a new form).
'please' is an anagram of 'ELAPSE'.
'and' is the link.
(Other definitions for elapse that I've seen before include "Tick by" , "Pass or expire - please" , "Pass away - asleep (anag)" , "(Of time) go by" , "Go by - pass away" .)