See if you can irritate (3)
I believe the answer is:
try
'irritate' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for try that I've seen before include "A rugby score, result of effort" , "Judge" , "crack" , "A rugby score crossing the line" , "shot" .)