Left remains creating strikes (6)
I believe the answer is:
lashes
'strikes' is the definition.
(lashing is a kind of striking)
'left remains' is the wordplay.
'left' becomes 'l' (common abbreviation).
'remains' becomes 'ashes' (I've seen this before).
'l'+'ashes'='LASHES'
'creating' acts as a link.
(Other definitions for lashes that I've seen before include "they could be batted" , "Beats" , "on the lid" , "Blows delivered with a whip" , "Rushes" .)