Polish off some creation (3)
I believe the answer is:
eat
'polish off' is the definition.
(I've seen this in another clue)
'some creation' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'EAT' can be found hidden inside 'creation'.
(Other definitions for eat that I've seen before include "Gobble up" , "Consume for tea" , "Feed" , "to do etching?" , "Corrode" .)