Sentence:  It was flood-tide along Fifth Avenue; motor, brougham, and victoria swept by on the glittering current; pretty women glanced out from limousine and tonneau; young men of his own type, silk-hatted, frock-coated, the crooks of their walking sticks <WSD>tucked</WSD> up under their left arms, passed on the Park side. 
Meaning of the word marked with <WSD> tags:  To push into a snug position; to place somewhere safe or somewhat hidden. (From 1580s.)