The label was designed with a kicking horse and horseshoe, a subtle reference to its extra kick compared to competing brands.

There could be subtle references to a batsman's technical defects, observations about his overall competence, or more wide-ranging inquiries about the health of his family.

Subtle references or jokes may be inserted to the visuals for comic effect or to add additional context to the narration.

I placed subtle references throughout the costumes in the show.

His performances included subtle references to his earlier works but with obvious influences from his more recent collaborations.