Irish elf (10)
I believe the answer is:
leprechaun
'irish elf' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for leprechaun that I've seen before include "He helps Irish housewife" , "Elf in Irish folklore" , "Mischievous imp" , "Mischievous Irish sprite" , "Mischievous Irish elf" .)