Answer: dugin

AnswerCrossword Clue
DUGIN

Firmly entrenched

DUGIN

Made trenches

DUGIN

Prepared for a long battle

DUGIN
Began to eat
DUGIN
Began eating
DUGINEntrenched
DUGINPrepared for a long fight
DUGINAte heartily
DUGINStarted one's meal
DUGINStarted to dine
DUGINEntrenched.
DUGINRefused to budge
DUGINStarted eating
DUGINStarted on a course
DUGINPrepared to make a defensive stand
DUGINPrepared to defend
DUGINGot to work