Irritated by plant on the day (7)
I believe the answer is:
nettled
'irritated' is the definition.
(I know that irritated can be written as nettled)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for nettled that I've seen before include "Stung!" , "Irritated as by stinging plant" , "becomes annoyed" , "Riled" , "annoyed one" .)