Kepton

5 clues
Continued
Persisted
Didn't stop
Didn't fire
Didn't quit
Similar answers:
&tongued
Abbydalton
Abitontheside
Aboutonceaweek
Aboutonebillion
Absentoneminded
Absorbentcotton
Abtoner
Abuton
Acarton
Acetone
Acetones
Acidtongue
Acquitoneself
Acton
Actonahaunch
Actonahunch
Actonbell
Actone
Actonesage