Romeo can be seen ignoring Victor. It's laughable! (7)
I believe the answer is:
risible
'it's laughable' is the definition.
(synonyms)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for risible that I've seen before include "Causing laughter - beyond a joke" , "Provoking laughter" , "Laughable, amusing" , "Laughter-provoking" , "Farcical" .)