### Clue: Arrest ex-doughboy on Rhode Island (5)
### Answer: RIVET 
 ### Explanation: Definition: Arrest
 VET(short for "veteran", who could be an ex-doughboy;a US infantryman especially in WW1) **placed after**(on, in an across clue) RI(abbrev. for the US state of Rhode Island).
Answer: To hold;to arrest, say, your gaze or attention.