Even breaking back again at the finish (6)
I believe the answer is:
veneer
'the finish' is the definition.
(I've seen this before)
'even breaking back again' is the wordplay.
'breaking' indicates anagramming the letters.
'back' shows that the letters should be reversed in order.
'again' becomes 're'.
're' backwards is 'er'.
'even' is an anagram of 'vene'.
'vene'+'er'='VENEER'
'at' acts as a link.
(Other definitions for veneer that I've seen before include "Outward respectability" , "Capital of Kenya" , "Superficial polish" , "Thin covering of expensive wood on furniture" , "Prepared" .)