Delete article in Irish language (5)
I believe the answer is:
erase
'delete' is the definition.
(I know that delete is a action)
'article in irish language' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'in' indicates putting letters inside.
'irish language' becomes 'Erse' (Erse can mean the Irish language).
'a' going into 'erse' is 'ERASE'.
(Other definitions for erase that I've seen before include "Scratch" , "Rub out, cancel" , "Delete" , "Put out of mind" , "Eliminate" .)