The phrase "a clear theme for" is correct and usable in written English.
It can be used when discussing the main idea or underlying message of a piece of work, such as a book, movie, or project.
Example: "The author presents a clear theme for the importance of friendship throughout the novel."
Alternatives: "a distinct theme for" or "a defined theme for".
He's a creative campaign tactician and an imaginative ad maker, but his great skill has always been an ability to find a clear theme for his candidates.
He's a creative campaign tactician and an imaginative ad maker — but his great skill has always been an ability to find a clear theme for his candidates, as he did for McCain in 2000, who ran then as a conservative reformer and champion of national greatness.
There were numerous proposals but a clear theme for stars and circles emerged.
And yet, in the disparate cases, one can already glimpse a clear theme: Trump's disdain for legal limits and, perhaps more dangerous, his almost uncanny ability to draw others into his vision.
But if you look at the witness interviews he's attended, and not attended, there is a clear theme: Gowdy is mostly there for the people directly connected to Clinton.
The focus groups were used as an opportunity to explore students and graduates understanding of the term with a clear theme emerging that the reason for the relatively low ranking (Table 1) linked to relating the term to laboratory research work as indicated by the quotes below.
The shows he curated in the 80s and 90s attracted media coverage at the time, but were criticized for lacking a clear theme or purpose, while his films seem to have gone more or less completely unseen.
Still, it is difficult to find a clear theme in all the colleges' application figures for this fall.
Of those questions that went unasked, a clear theme emerged about what was overlooked: accountability for the controversies that have followed the candidates throughout the campaign.
A clear theme in the 180 female focus groups was self-blame for the IPV ("strong mouth", disobedient, demanding or refusing sex).
As we examine today's disruptive companies, a clear theme emerges: a near-myopic focus on creating delightful, intuitive experiences for their end user or customer.
