Hi,
It can be done via CSS by using the ellipsis method (but it is only possible by "line", oppose to character count) more info:
css-tricks.com/snippets/css/truncate-string-with-ellipsis/
The other method is to use JavaScript (jQuery) to truncate the texts by character count. There are many tutorials about it on the web, just use the google.com to find them
The ideal method is to use truncate function of PHP, thus you need to dig in to category page PHP file of CleanMart and apply this function to product name variable (
$product->product_name).
But this is considered as 100% custom modification; unfortunately we don't provide free support or step-by-step instructions for custom coding modifications.
You may purchase premium support:
www.flexiblewebdesign.com/premium-support
and let us take care this modification for you directly on your website though.
Regards.
Support