A precious stone (7)
'a precious stone' is the definition.
(I know that emerald is a type of gem)
This is the entire clue.
(Other definitions for emerald that I've seen before include "Gem; type of moth" , "Mere lad (anag.)" , "...re medal? (Anag)" , "Green variety of beryl" , "Gem associated with Ireland" .)
'a precious stone' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for beryl that I've seen before include "Girl's name - precious stone" , "Coloured stone" , "- - Bainbridge (lit.)" , "Transparent mineral used as a gemstone" , "Blue, green or yellow mineral, sometimes a gemstone" .)