Infectious (5)
'infectious' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for catching that I've seen before include "Snaring" , "Attractive - infectious" , "getting infectious" , "Seizing" , "Contagious" .)
'infectious' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for viral that I've seen before include "Relating to a pathogenic agent of disease" , "(Of video) fast spreading" , "Rapidly becoming popular online" , "Of organisms that transmit infectious disease" , "Spreading rapidly" .)