Standard quantity stashed away by leprechaun, I think (4)
I believe the answer is:
unit
'standard quantity' is the definition.
(I've seen this in another clue)
'stashed away by leprechaun i think' is the wordplay.
'UNIT' is hidden in amongst the letters.
But, I'm uncertain how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for unit that I've seen before include "Single item; one" , "Small military detachment" , "Single item, maybe part of a set" , "- - trust" , "Individual thing; one" .)