Sentence:  <WSD>Tit for tat</WSD> hat / The phrase ‘<WSD>tit for tat</WSD>' ... emerged as a rhyme for ‘hat' in the late nineteenth century and was subsequently condensed to ‘titfer' around 1930, in which form it enjoyed unparalleled success at a time when virtually everyone wore a hat. 
Meaning of the word marked with <WSD> tags:  (hat) A hat. (from late 19th c.)