In French, German artist's not finished last (6)
I believe the answer is:
endure
'last' is the definition.
(I know that last can be written as endure)
'in french german artist's not finished' is the wordplay.
'in french' becomes 'en' ('in' in French).
'german artist' becomes 'durer' (artist Albrecht Durer).
'not finished' means to remove the last letter.
'durer' with its last letter removed is 'dure'.
'en'+'dure'='ENDURE'
(Other definitions for endure that I've seen before include "Bear, suffer" , "Bear something patiently" , "Continue to exist" , "Last or tolerate" , "Bear, stick it out" .)