Here are the possible solutions for sign up for duty clue
Answer
Clue
Relevancy
enlist
Clue
Sign up for duty
Definition
to engage for military service
reup
Clue
Sign on, as for another tour of duty
Sign on for another tour of duty
Sign on again, as for another tour of duty
omen
Clue
Good sign or bad sign
Definition
to provide with a prophetic sign
ptomaineconcourse
Clue
Warning sign at a train station's food court? (NOTE: The original sign, without my additions, actually exists. It's in Grand Central Terminal in NYC, on the lower level — the food court level. The sig