Of Irish butter? (3)
I believe the answer is:
pat
This clue might be a double definition.
'of irish' is the first definition.
The definition suggests a singular noun which matches the answer.
'butter?' is the second definition.
(a pat can mean a lump of butter)
Can you help me to learn more?
(Other definitions for pat that I've seen before include "Touch; name" , "Light touch or stroke" , "Touch lightly - bit of butter?" , "Glib; touch affectionately" , "Apt for tender touch" .)