That's why strict adherence to terms doesn't help — it's fifth column vs fourth estate! (gapingvoid.com)
Results of the T1 and T2 analyses indicate that relationships between some practices and smoking were mediated by smoking - related cognitions (fifth columns of Tables IV and V, respectively). (academic.oup.com)
A vital church family, beamed down by the effect of God's Word as a sort of fifth column in that land of cool exteriors and quiet despair. (firstthings.com)