Wicket-keeper's job is contagious! (8)
I believe the answer is:
catching
'is contagious' is the definition.
(synonyms)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for catching that I've seen before include "Attractive - infectious" , "Getting hold of or becoming infected" , "Seizing" , "Contagious" , "Stopping and holding a moving object" .)