Prospector's find (6)
I believe the answer is:
nugget
'prospector's find' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nugget that I've seen before include "Get gun to the lump" , "Piece of advice" , "bit of treasure" , "Lump of metal like gold" , "little wisdom?" .)