Lovatts Colossus No129 Stinker

Trying to finish off the last few:-
294a Eternity = E?? think it should be EON. The last letter is crossed with
271d Noun constructed from verb = G?R??D
12d liqueur-flavouring herb L??AGE
141d Gun barrel part - I have CHASE is this correct
163d Varec = KE?P (keep perhaps?)
178d Koran chapter = S?RA
181d As a whole (2,4) = I have EN BLOC
231d Knick knack = I have GIMCRACK

cheers
smithy