Shamrock, e.g. (6)
(Other definitions for clover that I've seen before include "Plant used as fodder (which it's good to be in)" , "Forage plant (that's luxurious to live in?)" , "Fodder plant, common on lawns" , "Pea family plant with three-lobed leaves" , "Meadow plant" .)
'shamrock eg' is the definition.
(shamrock is a kind of trefoil)
This is all the clue.
(Other definitions for trefoil that I've seen before include "Three-lobed leaf" , "Plant with three leaves, like shamrock or clover" , "clover, possibly" , "Three-leaved plant, eg clover" , "A flower; three-lobe ornament" .)