1.   As the cardinal introduced the confirmation candidates, he made a couple of sly references to his recent statements that had gained widespread attention.

2.   Maybe this is meant as a sly reference to the Hong Kong school of fantasy cinema, but it turns a serious moment into the stuff of camp.

3.   They are fluent in the language of sight gags and snappy comebacks, teasers and tag lines, sly topical references and quick moral lessons.

4.   During the campaign, Le Pen exchanged his usual harsh rhetoric for sly references to history.

5.   This was a sly reference to his visit to a Buddist temple.