Clear cache for specific site on Chrome for Android?
From the overflow (3 dots menu)

Settings &rarr; Site settings &rarr; tap All sites   &rarr; choose your site 
 &rarr;clear and reset

From Chrome help


  Cached images and files: Chrome remembers parts of pages to help them open faster during your next visit. Text and images from pages you've visited in Chrome are removed.


You will also lose browsing history, cookies and site data