The crossword solution for the term 'HULL's was 'OLD'' is 'IRONSIDES', which is a nine-letter word. The term 'Ironsides' is a nickname given to Oliver Cromwell's cavalry during the English Civil War in the 17th century. The nickname was derived from the fact that the cavalry was heavily armored and thus difficult to penetrate. The term 'HULL's was 'OLD'' refers to the fact that the Ironsides were led by Sir Thomas Fairfax, who was a veteran of the Siege of HULL in 1643.