The phrase "chant theme" is correct and usable in written English.
It can be used to refer to a specific theme or motif that is repeated or emphasized in a chant, often in a musical or poetic context.
Example: "The chant theme of the song captures the spirit of unity and celebration."
Alternatives: "refrain motif" or "melodic theme."
The Decepticons have a chanted theme which relies on electronics, unlike most of the score.
Bournemouth's fans chanted the theme music to Match of the Day and they were soon celebrating again after Ritchie's persistence saw him lash home from 12 yards.
Horn and trumpet players move silently from their places to take up positions around the vast hall, from where they engage in a conversation with more chant-like themes.
Mr. Daniels said that at Trojan's live events, students end up chanting the Trojan theme song, high-fiving Trojan representatives and taking posters to slap up on their dorm room walls.
That little chant just became the theme of the song.
The use of chant in the main theme has been credited with contributing to popular interest in the genre.
To this day I can feel the electricity spread through the audience from the blend of Western rock, church chants and a daring theme of Russian-American romance.
On paper, it shouldn't work: a collision of the Sweet's Blockbuster, Gary Glitter's Rock & Roll Pt II, Harry Enfield catchphrases, the Doctor Who theme and chants of "YOU WOT, YOU WOT, BOSH BOSH BOSH" – all fronted by a clapped-out US cop car called Ford Timelord.
In the 1970s and 80s, the subject of drugs had become a popular theme in chants among ultras groups.
While many gathered showed their dislike for the incoming president with their chants and placards, the theme was one of unity and action for women on the island, calling for job equality, access to quality education and protection from sexual violence.
