Start again with a newer blend (5)
I believe the answer is:
renew
'start again' is the definition.
(to renew something is to start it again)
'newer blend' is the wordplay.
'blend' is an anagram indicator (I've seen 'blended' mean this).
'newer' with letters rearranged gives 'RENEW'.
'with a' acts as a link.
(Other definitions for renew that I've seen before include "Update library book, acquaintance, etc" , "Begin again" , "Revive" , "Restore - recommence" , "what regeneration will do" .)