Quarry of eminence (4)
I believe the answer is:
mine
'quarry' is the definition.
(type of mine)
'of eminence' is the wordplay.
'of' indicates a hidden word.
'MINE' can be found hidden inside 'eminence'.
(Other definitions for mine that I've seen before include "Explosive device - belonging to me" , "Pit; source" , "Types of war vessels" , "Bomb - colliery" , "Store" .)