He could not, of course, understand this strange conversation, but he could discern its drift, and the suggestive underplay in the big man's words.
"The Coming of the Law"
Charles Alden Seltzer
If you use it, underplay it.
"The Creature from Cleveland Depths"
Fritz Reuter Leiber
And the speaker, with a quizzical smile upon his face, which half concealed and half revealed an underplay of devilish mockery, put his hand familiarly upon the shoulder of Ashton, and then grasped him by the hand and gave it a hearty shake.
"From Wealth to Poverty"
Austin Potter