The phrase "leading theme" is grammatically correct and can be used in written English.
It refers to the main or most prominent subject or idea in a sentence, paragraph, or piece of writing. Example: In the novel, the character's struggle with identity is the leading theme that drives the plot forward and shapes their relationships with other characters.
Molecularly targeted therapies have emerged as the leading theme in cancer therapeutics.
Opposition between idealism and realism as a leading theme in Cervantes's fiction, including the Exemplary Stories and his plays, remained influential as late as the mid-20th century.
Though Mr. Bush began his term promoting oil drilling in an Alaskan wilderness area, his leading theme now seems to be using human, animal and agricultural waste to produce fuel, electricity and petroleum substitutes.
This year, between July 1 and Nov. 4, the leading theme is the circus, with troupes from all over the world, including Pocheros, a local troupe, July 20 to 22, and the Baobab Circus from Guinea on Aug. 10 to 12. Access is free to the 64-acre park but not to the castle, where an adult ticket costs $4 and a child's ticket costs $1.50.
A leading theme of the speech will be high-paying jobs.
The author, the UK's leading theme park and dance music combo journalist.
Fear of crime and fear of mass immigration were the two leading themes of his campaign.
ESCAPE-14 focus on five main leading themes: product and process design, synthesis and process integration, process control and analysis, manufacturing and process operations, and new challenges in CAPE.
The main lines of Bizet's plot, his two chief characters, Carmen and Don José, the opera's leading themes and keywords, Carmen's song "Stab me, burn me" — all this and more comes straight out of Pushkin's Gypsies.
The second is that one of the leading themes of the period, an ideological umbrella conjugated in radically different ways in different countries and in different periods, was the doctrine of development, or what may be expanded to the philosophy of developmentalism (Desarollismo).
Three leading themes seem to shape the new approach.
