The phrase "wider clientele" is correct and usable in written English.
You can use this phrase when you want to indicate that a business is expanding the range of potential customers that it serves. For example, "The new marketing plan is designed to help our business reach out to a wider clientele."
"These teas are appreciated not just by purists, but by a much wider clientele now".
If he broadened the festival's range of operas he might attract a wider clientele.
So she has expanded her menu to attract a wider clientele.
I'm not suggesting to paint them pink, but catering to a wider clientele may aid their survival.
Some are university owned, some are owned and run by property companies on behalf of the university and others are private and open to a wider clientele.
It has branches or subsidiaries in 12 countries, aiming its services mainly at Indian communities overseas but sometimes finding that they attract a much wider clientele.
Hispanic restaurants and Caribbean food shops have proliferated downtown but have not drawn a wide clientele.
SITARS The gently priced goodies appeal to a wide clientele of young women and older couples of all cultures and planets.
The Exercise Coach addresses this problem with an exercise program that is designed to be accessible to a very wide clientele who are otherwise intimidated by big gyms and high-intensity exercise regimens -- a perfect for mula for Boomers, who can get great results with a moderate and steady exercise program.
As president of MorningStar, Ryan Weckerly has an extensive clientele base in the medical marketing and a wide range of retail clients.
Still, Chase, with its extensive branches and wide-ranging clientele, relies on a corporate culture drawn more from the streets of New York than of the rarefied air breathed by those at Morgan.
